Create Key Exchange

RSA methods
Update and rename Key Exchange to GenDhParams

Generate D-H parameters
Update GenDhParams
Update GenDhParams

Generating a Parameter Set for the Diffie-Hellman Key Agreement Algorithm
Create GenADhKey

Generating a Secret Key Using the Diffie-Hellman Key Agreement Algorithm - A's side
Create GenBDhKey

Generating a Secret Key Using the Diffie-Hellman Key Agreement Algorithm - B's side
Update GenADhKey
Update GenBDhKey
Update GenBDhKey
working text conversation ui
Merge pull request #1 from lillian1991/Lian

Lian
Merge pull request #2 from teebeck/becktk/ui

Becktk/ui
encryption session action bar lock button toggle
new conversation -> simpleSMS activity
Merge remote-tracking branch 'origin/master' into anjola/crypto
Added crypto functions and message sender and handler