Delete unused header file

Change-Id: I096560865107ca522fe1067e69d74880c210ee1f
Set target API level explicitly to 19

Change-Id: If64ddeb2301e4267c59b8c2fb0fd353a8437025c
Sync Ymagine source with v0.5.0

Change-Id: I4e12e5e50e09f3820620116486cc6fcfff02bbfa