New features galore!

To see the exhaustive list of pull requests included in this release see: https://github.com/channelcat/sanic/milestone/3?closed=1

Highlights

• Added in redirect method (#294, thanks to @pcdinh and @subyraman)
• Added rich HTML tracebacks for debug mode (#291, thanks to @subyraman)
• Fixes a write_error loop that could lead to stack overflows (#309, #307, #241)
• Route overloading! Multiple functions for different methods of routes! (#311, thanks to @youknowone)
• Greatly improved documentation along with sphinx compatibility (#229, thanks to @kdelwat)
• Function decorators now have `['GET'] as the default method (#316, thanks to @youknowone)
• Removed the multidict requirement with our own implementation of CIDict (#302, #328)
• Added an async run function to the app (#348)
• Removed loop as an argument for the app (#335)