added localstorage shim adapter, Firefox is untested
added local storage shim to all the templates
tested local storage shim on Firefox Xul
fixed nav bar display on Help app when logged out
added documentation for PlainPost app
added documentation for ZeroBin app
added threat model docs for PlainPost app
Merge pull request #91 from fullvlad/master

Added documentation for the applications
fixed links for ZeroBin doc
fixed links for PlainPost docs
Merge pull request #93 from fullvlad/master

Fixed links for documentation files
solution for issue #87
changed History's buttons size, added preview scroll animation
added tempalte extension to navigation.html
added new page to open banner
updated templates with new changes
updated manifest and added logical code for new page
added built pages
renamed Help js file, droped banner '_blank' target
dropped 'new' in Help pages' title