Multi-worker Fix, Virtual Hosts support, etc.

This pull request encompasses a lot of bug fixes among other things.

To see the exhaustive list visit: https://github.com/channelcat/sanic/milestone/2?closed=1

Highlights:

• Multiprocessing fix #276 (Thank you to @r0fls)
• Updates to class based views to make them thread safe #274 (Thank you to @AntonDnepr)
• Adding support for virtual hosts through the main application and blueprints #285, #287
• Added methods to remove routes from api/router #243 (Thanks to @dutradda)

Next up on the table:

• Finishing up WSGI compliance (Maybe looking into ASGI compliance as well)
• Working to finish up live reload as highlighted in #168 (We have a prototype but it's not as efficient as I'd like it to be)
• Moving our documentation to Sphinx and publishing to readthedocs as highlighted in #229

Bug Fixes, Various Error Handling Improvements

PR's included in the milestone can be found here: https://github.com/channelcat/sanic/milestone/1?closed=1

Changes:

• Addition of Python 3.6 to tox tests and travis tests (We will eventually be using the tox.ini as our main travis testing script as well)
• New raising of error if an invalid response is returned
• Add in a way to encode objects that are un-encodable in response objects

Adding HTTPMethodView

Changelog:

• Added HTTPMethodView #167
• Added shared request storage #163
• Changed request timeout process #172
• Provide a default app name #159

Static files

Changelog:

• Static file support
• Lazy Cookie Setting (slight speed improvement when not setting cookies)

0.1.5

Changelog:

• Cookies
• Blueprint listeners and ordering
• Faster Router
• Fix: Incomplete file reads on medium+ sized post requests

Breaking:

• after_start and before_stop now pass sanic as their first argument. Current event listeners will need to be updated to accept the new argument