set new hash without adding an entry into the browser history
this update solves the back-butten issue when playing & pausing
the code useses the HTML5 History API which is available in nearly all
FF and WebKit's and IE10+. Older browsers get the fallback to
traditional setting window.location.hash, which triggers a new history
event
podlove forward-compatible timecodes
following http://podlove.org/deep-link/#appendingtimerangeinformation
and successively http://www.w3.org/TR/media-frags/ we use &t=123
to sign the target playtime.
if anywhere in the future we're going to upgrade to podlove, the
timecode-permalinks will keep working
Merge pull request #19 from MaZderMind/timecode-permalink

set new hash without adding an entry into the browser history