Remove HoloEverywhere support

Since the library is deprecated, we should not support it anymore.
Remove GreenDroid support

The library is deprecated since early 2013, so it is time to drop
support of it.
Merge pull request #1099 from WonderCsabo/1060_removeHoloEverywhere

Remove HoloEverywhere support
Merge pull request #1100 from WonderCsabo/522_dropGreenDroid

Remove GreenDroid support