Fixed #553
typo
fixed string
Updating Russian
Update changelog_master.xml
Fixed #551
Fixed #566
Fixed #540
Fixed #540
Added plot graph type
Merge branch 'master' of github.com:asksven/BetterBatteryStats

Conflicts:
	BetterBatteryStats/res/layout/activity_systemapp.xml
Merge pull request #571 from gaich/patch-5

Update changelog_master.xml. Thanks to gaich @ XDA
Merge pull request #570 from gaich/patch-4

Updating Russian. Thanks to gaich @ XDA
Merge remote-tracking branch 'upstream/master'
Fixed #491
Merge remote-tracking branch 'upstream/master'
Czech translation update

Matching #491 #540