Revert "License"

This reverts commit 4a21e04c73cd8dc16c8c2a4ac1040a7e4ec5e538.
Revert "minor change in mainactivity"

This reverts commit d1916ba6d5d58d7da41b5b28eb64c6713d595b18.
Revert "Revert "License""

This reverts commit 473c2db41a6518fa4d6186cfd3c7aeada93b9d82.
Modified README