Tidied comments and dropped Python 2.7 support (#6)

* tidied comments

* drop support for Python 2.7

* updated travis config

* added pycodestyle

* tidied classes

* removed weird/bad logging

* tidied style

* updated type sigs

* fixed bad indentation

* bug fix: missing char

* short comment

* tidied exceptions

* simplified imports

* fixed bad construction

* fixed bad from_dict

* bug fix: missing import

* no travis support for 3.7

Author: ChrisTimperley

.travis.yml

@@ -3,13 +3,13 @@ sudo: required
 services:
 - docker
 python:
-- '2.7'
 - '3.5'
 - '3.6'
 install:
-- pip install mypy
+- pip install mypy pycodestyle
 - pip install .
 script:
+- pycodestyle src
 - mypy src --ignore-missing-imports
 notifications:
   email: false

setup.py

@@ -23,7 +23,7 @@
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
     ],
-    python_requires='>=2.7',
+    python_requires='>=3.5',
     install_requires=[
         'requests>=2.0.0',
         'typing>=0.4.1'