Revert "Use path.set instead of changePage to go to login. Probably works around a race-condition in our code"

This reverts commit 02b5dd04719fe6c3e32ec543edaadf028f60b3f2.

IE10 didn't land on login-page because of this
Play/pause buttons doesn't always enter the correct state after pause
Don't lookup the same element so many times
Group browser sniffing and better error logs
IE11 throws an error while still loading some audio-files

Ignore that error in our error handler and pause+play to
reset the playbackRate
Clean up styling of cover and progressbar in #book-player
Remove unused CSS rules
Force minify css to build, because we can't be sure dev version is overwritten otherwise
Merge branch 'master' into NOTA-731
Merge branch 'master' of github.com:Notalib/LYT into NOTA-731
Fix indentation of html-files
Follow up on comments from mzr
Mistyped removeClass 'loader-icon' as 'loading-icon'
Adds test description
Update changelog.md
Minor update to doc/playbackrate.text
Don't scroll to segment/image while not visible
Play after select chapter in book-index
Disabled page transition
Always call @seekSmilOffsetOrLastmark on load book, even if click-hook is needed