Desaturation effect fix.

- Now supports pre-API19 via a call to a deprecated method (recommended way only supports 19+)
- Now supports desaturation with no blur
Begin updating for material design and Android 5.0
Merge branch 'desaturate_fix' of https://github.com/OS-Chris/muzei into OS-Chris-desaturate_fix

Conflicts:
	main/src/main/java/com/google/android/apps/muzei/render/MuzeiBlurRenderer.java
Continue material design updates, focusing on styles and gallery settings
Merge branch 'master' of https://github.com/romannurik/muzei