merge conflict fix

Author: SergeyPirogov

README.md

@@ -23,13 +23,17 @@ Currently available features:
 Installation
 ------------
 
-The **testcontainers** module is available from PyPi at:
+The **testcontainers** module is available from PyPI at:
 
 * https://pypi.python.org/pypi/testcontainers
 
-and can be installed using ``pip``.
+and can be installed using ``pip``, depending on which containers you need:
 
-    pip install testcontainers
+    pip install testcontainers[mysql]
+    pip install testcontainers[postgresql]
+    pip install testcontainers[selenium]
+    # or with multiple
+    pip install testcontainers[mysql,postgresql,selenium]
 
 Basic usage
 -----------

docs/index.rst

@@ -21,11 +21,15 @@ Installation
 The testcontainers module is available from PyPi at:
 
 https://pypi.python.org/pypi/testcontainers
-and can be installed using pip.
+and can be installed using pip, depending on which containers you need:
 
 ::
 
-   pip install testcontainers
+   pip install testcontainers[mysql]
+   pip install testcontainers[postgresql]
+   pip install testcontainers[selenium]
+   # or with multiple
+   pip install testcontainers[mysql,postgresql,selenium]
 
 
 Compatibility

setup.py

@@ -38,14 +38,14 @@
         'Operating System :: MacOS',
     ],
     install_requires=[
-        'selenium==2.53.1',
         'docker',
         'wrapt',
-        'pymysql',
-        'sqlalchemy',
-        'psycopg2',
         'crayons',
         'blindspin',
-        'pymysql'
     ],
+    extras_require={
+        'mysql': ['sqlalchemy', 'pymysql'],
+        'postgresql': ['sqlalchemy', 'psycopg2'],
+        'selenium': ['selenium==2.53.1'],
+    }
 )