Add support for mipmaps in layouts.
Merge branch 'master' of https://github.com/robolectric/robolectric into support_mipmap_resources
Fix incorrect assertion in the test. The change in this PR inadvertantly fixed a bug whereby invalid resources were being added to the map.
Merge pull request #1282 from jongerrish/support_mipmap_resources

Add support for mipmaps in layouts.