cLock: Make the list of calendar entries scrollable (max. 10 entries)

This changes the rendering and calendar data aquiration quite drastically, as
a new widget service had to be introduced.

Change-Id: I5bcdaa952acde2caa5a3f04b2c8c98868fd7cbfb
cLock: minor code cleanups (remove unused imports/variables/dead code, explicit usage of default locale)

Change-Id: Ib570f492a5163089542871020eb9db0a19019951
LockClock: Updated Polish language for font colors

Change-Id: I541d79cea891066ec8d30ba4af0daeff67b27282
cLock: Hide the calendar panel if there are no events to show

This fixes a regression introduced with the scrolling events list
feature

Change-Id: I949cc7ee72ecbd866ad6037454a647cab05404c9
Merge "LockClock: Updated Polish language for font colors" into cm-10.1
cLock: Change Calendar default lookahead to two weeks

Change-Id: If31008a8485008a4b40cc42d62ac043be521a937
Merge "cLock: Hide the calendar panel if there are no events to show" into cm-10.1
Merge remote-tracking branch 'upstream/cm-10.1' into cm-10.1