Merge pull request #29 from ASMfreaK/master

Russian localization
Notify changes right after the task is deleted
Clear tasks which finish in foreground mode
Obtain missing localized string using Google translate
Show the 'Open PDF' and 'Open progress' only when applicable
Use a 'Refresh' button instead of the mysterious 'Send' to convey its meaning to (re)initiate the task
Remove unused image resources
Update German translation
Merge pull request #30 from He-Ro/master

Updated German translation (again)
Official release 2.3.5.7
Swap the consent/decline buttons (to be consistent with Android UI guideline)
Use Holo blue light instead of black as background color for many buttons (except for task control ones)
Add missing string resource `pref_summary_get_packages_from_dropbox` using Google translate
Remove more unused resources
Added Playstore description
Added German translation of Playstore description
Merge pull request #31 from He-Ro/master

Play Store Description added
FIX: ignore case when comparing engines
Merge branch 'master' of https://github.com/anhoavu/TeXPortal
Add a Japanese play store description.
Merge pull request #32 from yoneken/JapaneseTranslation

Add a Japanese play store description.
update japanese translation.
Merge pull request #34 from yoneken/JapaneseTranslation

Update Japanese translation.
Added russian translation to Play desc. and updated localization.