adds keystoring support
fixes null keystore bug, clears some UI stuff
removes leftover Toast
merged
sets up the ViewMyFingerprintActivity
still learning how to use git...
Merge pull request #5 from teebeck/brayjd/keystoring

Brayjd/keystoring
Merge pull request #6 from teebeck/anjola/crypto

Anjola/crypto
symmetric encryption added, attempted but failed at displaying decryption
Removed unused methods and fixed symmetric encryptor