Fix typos and spacing issues
Fix typos in otherrulesandfeatures
Fix typos in unsupported
Fixes #21 - GH may add trailing newline
Fix quotes in example code
Fix quotes in some comments

As seen at http://docs.hhvm.com/manual/en/hack.annotations.examples.php
Clarify that else if does not require curly braces

This question came up a few times, so I think it's worth clarifying.
Fix typo in type aliasing

Fixes #1

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Move second tuple note to a place where it makes sense to say "the code above"

Fixes #2

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Filename mistake in opaque type aliasing example.

Fixes #4

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async fix #69
Use more neutral example for constraints
Make canonical links point to docs.hhvm.com

Fixes #76

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Make favicon use the new logo

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Grammar
Fixed Typo in Docs
Merge pull request #86 from dcsg/patch-1

Fixed Typo in docs
Merge pull request #85 from audiojak/master

Grammar
Merge pull request #81 from rosstuck/generics-text-change

Text change for generics constraints
Merge pull request #70 from thiagooak/master

async fix example error #69