code refactoring

made compatible with jshint
scan button now working again

colors and positioning still wrong though!
added comment
adapted to page update

- scan button has the right colors again
- and is inserted at the wished position in dom.
upgraded and modified zip.js library

backup via RAM now works again.
problem was caused by a bug in chrome with blobs.
scan button is blue again
Setup button shown for every comic now.

Thanks to @mattjmorrison.
adaptive pagenum correction
better pageNum correction
easier setup

reduces possible confusion when a comic, that isn’t opened at the
beginning, is used for scanning.
updated bundles and version

ready to update
awaiting bug reports
2.0.2 RC2

fixed minor UI bug, that could cause wrong button sizing, when
switching from series pane to my books pane.

this introduces a minor performance loss, which is acceptable though.
Merge pull request #22 from Cortys/2.0.2

Update to Version 2.0.2