Set version flags for release

Set version flags for 0.8.0 release

Merge branch 'develop'

Merge branch 'master' into permessage-deflate

Update permessage-deflate to track latest release version.

Merge branch 'develop'

Conflicts:
	CMakeLists.txt
	Doxyfile
	changelog.md
	readme.md
	websocketpp/version.hpp

changelog typo

Merge branch 'develop'

Merge branch 'develop'

0.3.0 release

WebSocket++/0.3.0-alpha4