Revert "lowering minimum SDK, now depending to android support lib"

This reverts commit 41138cc95faece6f1862a5117e5a09f4abfd9bfc.
Merge branch 'experimental' of https://github.com/yunarta/works-http-cache into experimental
8cc95faece6f1862a5117e5a09f4abfd9bfc.

Conflicts:
	library/build.gradle