Port lockscreen info-lines from ICS (1/2)

- Restructured lockscreen layout: keyguard_screen_info.xml contains the informational elements, this should be included on each layout (except in sw600dp)
- Weather: added back text option
- Calendar (upcoming events): added back w/ all of the old features
- Cleaned up lots of code

PS2: Rebased, amended color-switcher functions
PS3: Fix disappearing weather&calendar lines after rotation
PS4: change clock top margin back to 20dip
PS5: add back weatherpanel/text to statusbar
PS6: fix center layout of glowpad if user lowered the factory DPI
PS7: fix center for real
PS8: add back onclicklistener to statusbar weatherpanel (refresh/customapp)
PS9: fix NPE in CalendarEntry (b/c of colors)

I'd say it's ready to merge now.

Change-Id: I43429db7a85d22d41f422c189f0383c1f1143ef9