Added Lollipop theme

Added a Lollipop theme for API 21+ users. 

Themed the seekbar values to be either Holo Blue (< 21) or teal green
500 (> 21)

Changed the separate lines to "dkgrey" rather than "ltgrey". Fits much
better.
Updated manifest. Squashed some errors

Squashed some build errors when accessing the manifest on the latest SDK

Updated target to v21
Removed "Flash Kernel" button. Who uses this?
Right aligned the seekbar value, so that it's not lost under your thumb
Updated project properties
Updated .gitignore