Match user agent directly instead of $.browser variable

Our version of $.browser works differently than the "native"
version in jQuery 1.7

Fixes #369
Re-think subtitle handling when seeking, fixes #424
Handle playlist element and video element insertion consistently

This fixes #427 - issue with non-clickable prev and next elements
Also use jQuery map-polyfill for older browsers, fixes #426
Don't add resume callback if only one item in playlist, fixes #419
Update branding.min.js
CONTRIBUTING: fix links, advice to search forum first (#437)

Bug tracker cannot be linked absolutely or relatively from repo.
For some reason netStream.resume() is required when switching to a  second stream using the same netConnection.
renamed one method for clarity
Fix error when played inside iOS facebook application
Update changelog
fix for replaying with the flash engine (non rtmp) (#444)
Version bumb