Python 2 compatibility

Fixed errors when running on Python 2

API key support, better output, better encoding handling

• API key support (OMDb Web API now requires a mandatory API key)
• Better encoding handling to prevent encoding errors in Windows console
• Correctly format 'ratings' and 'episodes' (previously they'd appear to be JSON since they're dicts in a list)
• Doesn't include unneeded "response: True" text in output
• Set 6 second timeout to prevent long hangs since website tends to time-out often
• Print better help message when no args are passed

Note: github repository was renamed to omdb-cli, however github should take care of redirecting all existing links and checked out repos so nothing should be broken.

Marked as pre-release since it was only briefly tested on Python 3.5 on Windows, Python 2.7 support and other stuff might be broken.

2.3

Starting from 2.3 to align with pre-existing Arch Linux package (see #7)