Allow users to create their own checkpoints while tweaking the book
Output profile for the SONY PRS T3
Fix incompatibility with older sip/PyQt4
...
Update Daily Express
Update dbus, and PyQt4 versions in the linux binary builds
Add build integrity tests for dbus
Kobo driver: Fix latest firmware update for Kobo Wifi causing calibre to not recognize it. Fixes #1251536 [Calibre not recognizing Kobo device](https://bugs.launchpad.net/calibre/+bug/1251536)

Bug #1251536 reports an updated firmware for the Kobo WiFi. This also
changed the device id fromPID=0x4161 to PID=0x4162. It also needed an
update to the DBVersion.
Include full path in error message when failling to read cover
Allow right clicking on covers to copy them in the metadata cover download dialog. Fixes #1251793 [[FEATURE REQUEST] copy image for downloaded covers](https://bugs.launchpad.net/calibre/+bug/1251793)
Implement adding files to the book
Clicking on the preview panel moves the cursor to corresponding location in the editor
Fix bug #1251768 by allowing case changes when editing any text-based custom column directly on the spreadsheet.
Implement position sync from editor to preview panel
Fix editing custom column values in the book list not allowing change of case. Fixes #1251768 [[Glitch] Case change in library list cell](https://bugs.launchpad.net/calibre/+bug/1251768)

Merge branch 'master' of https://github.com/cbhaley/calibre
Handle fontconfig configuration that included un-deodable font paths

Fix crash on linux systems whose fontconfig configuration includes paths
to in an undecodable encoding.
Update Pecat

Fixes #1252285 [Updated recipe for serbian magazine Pecat](https://bugs.launchpad.net/calibre/+bug/1252285)
Button to turn of preview position syncing
Separate the sync toggles from the other buttons
Action to go to specified line