Fix documentation mistakes

This commit does two things: it fixes some bad documentation mistakes in the example sections of each cue and it swaps certain images for better ones.

Author: giosali

docs/source/_static/confirm.png

@@ -25,5 +25,6 @@ List of cues
     cues/checkbox
     cues/confirm
     cues/form
+    cues/password
     cues/select
     cues/survey

docs/source/_static/form.png

@@ -86,9 +86,9 @@ In the previous example, we initialized separte variables for the ``__init__`` m
 
 
     checkbox_dict = {
-        name = 'guitars'
-        message = 'Pick your favorite guitars:'
-        options = [
+        'name': 'guitars'
+        'message': 'Pick your favorite guitars:'
+        'options': [
             'Les Paul',
             'Stratocaster',
             'Telecaster',

docs/source/_static/password.png

@@ -76,7 +76,7 @@ When you "send" the cue to the user, they will be presented with something that
 
    *The Form cue*
 
-The user will not be expected to answer these prompts by typing their responses. Once the user has finished, a ``dict`` containing another ``dict`` will be returned. The inner-``dict`` will consist of key-value pairs of your ``fields`` and the user's responses respectively. The result will resemble the following:
+The user will then be able to answer these prompts by typing their responses. Once the user has finished, a ``dict`` containing another ``dict`` will be returned. The inner-``dict`` will consist of key-value pairs of your ``fields`` and the user's responses respectively. The result will resemble the following:
 ::
 
     {
@@ -126,9 +126,9 @@ In the previous example, we initialized separte variables for the ``__init__`` m
 
 
     form_dict = {
-        name = 'basic_info'
-        message = 'Please fill out the following form:'
-        fields = [
+        'name': 'basic_info'
+        'message': 'Please fill out the following form:'
+        'fields': [
             {
                 'name': 'first_name',
                 'message': 'First name'

docs/source/_static/password_endswith_alnum.png

@@ -0,0 +1,109 @@
+Password
+========
+
+This page will explain how to use the ``Password`` cue of the `Cues` library.
+
+``Password`` objects are useful when you need input from the user but would prefer their input be hidden while they type as it may contain sensitive information. The expected input is a ``str`` object. The result is a ``dict`` containing a ``str``.
+
+Before we start, make sure you have `Cues` `installed <../install.html>`_.
+
+Setting up
+----------
+
+``Password`` objects have three required parameters:
+
++------------+------------+------------+------------+
+| Parameters | Type       | Optional   | Default    |
++============+============+============+============+
+| name       | str        | No         |            |
++------------+------------+------------+------------+
+| message    | str        | No         |            |
++------------+------------+------------+------------+
+
+The signature for the ``__init__`` method of a ``Password`` object:
+::
+
+    def __init__(self, name, message):
+        # ...
+
+With that out of the way, we first need to start by importing ``Password`` from the `Cues` library:
+::
+
+    from cues import Password
+
+Now, we need to instantiate a ``Password`` object. We can do this with a little bit of setup by initializing some variables:
+::
+
+    name = 'password'
+    message = 'Password:'
+
+In the code above, we created the variables ``name`` and ``message``:
+
+- ``name`` will be used to retrieve the results from a ``Password`` object
+- ``message`` is the text that will be displayed to the user
+
+That's it! Our setup is complete. We can now go ahead and initialize a ``Password`` object to ask the user to enter a password by invoking the object's ``send`` method:
+::
+
+    cue = Password(name, message)
+    answer = cue.send()
+
+When you "send" the cue to the user, they will be presented with something that looks like the following:
+
+.. figure:: ../../_static/password.png
+   :width: 600px
+   :align: center
+   :alt: password snapshot
+   :figclass: align-center
+
+   *The Password cue*
+
+As the user types, asterisks will appear where their input normally would if you were to use Python's built-in ``input`` function. The user can use the Backspace/Delete key to undo any mistakes or reset their input. Once they're done, they can hit the Enter key and a ``dict`` will be returned with a ``str`` object:
+::
+
+    {'password': '1234'}
+
+Two formats
+-----------
+
+There are two possible formats that can be used for displaying the `message` to the user: one that ends with a bullet point and one that doesn't.
+
+If your message ends with an alphanumerical character (A-Z | 0-9), then a bullet point will separate the message you provide and the user's input:
+
+.. figure:: ../../_static/password_endswith_alnum.png
+   :width: 600px
+   :align: center
+   :alt: password snapshot
+   :figclass: align-center
+
+   *The Password cue*
+
+Otherwise, if your message ends with a colon or a question mark, the only thing separating your message and the user's input will be one whitespace character:
+
+.. figure:: ../../_static/password.png
+   :width: 600px
+   :align: center
+   :alt: password snapshot
+   :figclass: align-center
+
+   *The Password cue*
+
+
+Instantiating from a dict
+-------------------------
+
+In the previous example, we initialized separte variables for the ``__init__`` method of a ``Password`` object. *However*, we could also make use of the class's ``from_dict`` classmethod and instantiate by using a ``dict`` instead:
+::
+
+    from cues import Password
+
+
+    password_dict = {
+        'name': 'password',
+        'message': 'Password:'
+    }
+
+    cue = Password.from_dict(password_dict)
+    answer = cue.send()
+
+The names for the *values* in this ``dict`` must be the same as the names of the parameters in the ``__init__`` method.