Passtrust version 1.2 - improvements and bugfixes

• fixed a false prompt on the -p flag
  7c5423c
• updated linux and android install scripts to include clipboard gem
  a255ec2
• merged the verification function with the ask_passphrase function
  d81ac3b
• use Sysrandom instead of SecureRandom (sysrandom is a more secure alternative)
  36b9972
• visual fixes and improvements
  547de6d
  86ac6a4
  72fe8d4
• passtrust now on AUR