moved event.preventDefault() inside of if-then structure
Added a line to the changelog for #1760
Export tech.setSetsource method for Html5 and Flash
Added a line to the changelog for #1753
Fix rtmp rtmpSourceHandler calls to tech
Added a line to the changelog for #1755
Release 4.11.3
Merge branch 'stable'

Conflicts:
	dist/video-js/video-js.css
	dist/video-js/video-js.min.css
	dist/video-js/video.dev.js
	dist/video-js/video.js