Merge pull request #350 from chrox/master

update koreader-base (fix OCR init failure)
Merge pull request #351 from chrox/master

fix lost refresh in inputdialog enter callback
fixed issue: https://github.com/koreader/koreader/issues/354
Merge pull request #358 from hchaojie/master

fixed issue: https://github.com/koreader/koreader/issues/354
Fix DPI for nex Kobo Aura (phoenix).
Merge pull request #361 from giorgio130/master

Fix DPI for nex Kobo Aura (phoenix).
Tentative fix for touch coordinates on phoenix.
Merge pull request #362 from giorgio130/master

Tentative fix for touch coordinates on phoenix.
Fix input for kobo phoenix, second iteration.
Merge pull request #363 from giorgio130/master

Fix input for kobo phoenix, second iteration.
Crappy rework of the model detection on Kindle.

In case it wasn't obvious, I badly suck at lua :D.
Merge pull request #364 from NiLuJe/master

Possibly slightly less broken PW2 detection
fix kindle paperwhite2 support
reported at http://www.mobileread.com/forums/showpost.php?p=2696481&postcount=316
tested at http://www.hi-pda.com/forum/redirect.php?goto=findpost&ptid=1078988&pid=23393929
revert main GUI font to better-looking DroidSans