add new string ViewIdentityActivity_my_identity_fingerprint
Merge pull request #941 from Wikinaut/add-new-string-ViewIdentityActivity_my_identity_fingerprint

add new string ViewIdentityActivity_my_identity_fingerprint
Build native code for multiple architectures.

 * Include native libs without requiring intermediate .jar.
 * Fix build warnings; use latest build tools.
Add libcurve25519 bins.
// FREEBIE
Fix for periodic directory refresh.
// FREEBIE
Auto-update every 12 hours instead.
// FREEBIE
ViewIdentity mnemonic changes