Performance boosted

By reducing localStorage usage (who would expect it to be so slow)
Merge branch 'master' of https://github.com/Litres/FB3Reader
Issue #13 fixed + several other fixes/improvements

Including footnotes autoscrolling
Work in progress
That state was fast
Still fast
And this was even faster one
And this one is slow. How so?
Refactoring in progress
Somehow it got slow (at least now the code WAS changed)
Be the git damned forever
untracked files on master: daa4b4b Be the git damned forever
index on master: daa4b4b Be the git damned forever
WIP on master: daa4b4b Be the git damned forever
A bit of code
100% anync rendering
This fixes should be in trunk as well
Work in progress
Idle processing refactoring done
TOTAL ASYNC, damn it!