BK-1304 Implement security checks now that we have Roles in editor
BK-1305 Add 'view all books' link to the front page
BK-1306 Some of the panels in the editor are not scrollable
BK-1301 Unicode warning on book export from command line
BK-1201 Switch of language used in the interface
Merge branch 'BK-1301' into 2.0
BK-1308 bookload management command has some debug output
BK-1309 Implement Zen mode in the editor
BK-1310 Nothing shows up for the empty route in the editor
BK-1311 Status change is saved but never propagated or refreshed in the editor
BK-1312 Changes in the CSS file regarding size of the buttons
BK-797 Aloha plugin for table management
BK-1320 Popup window does not show when user selects link in the editor
BK-1321 Toolbar plugin should be able to accept custom styles in the dropdown menu
BK-1323 Reformat README and setup file

`setup.py` is now fully `pep8` compliant

As part of http://24pullrequests.com/
BK-1323 Reformat README and setup file

Updated README

The README.txt was renamed to README.md to present it nicely on Github.
Also updated the README itself and included some links and stuff.

As part of http://24pullrequests.com/
BK-1195: Implement chapter history tab
Merge branch '2.0' of github.com:sourcefabric/Booktype into BK-1195

Conflicts:
	lib/booktype/apps/edit/channel.py
	lib/booktype/apps/edit/static/edit/js/booktype/edit.js
	lib/booktype/apps/edit/templates/edit/book_edit.html