Fixes bug which caused double PGP sign

Corrects encryptAndSend() behavior to return true at the end
Update rc_openpgpjs.js

Patch for #47
Merge pull request #48 from lazlolazlolazlo/patch-1

Patch for #47
Refactors algo determing part from updateKeyManager() into own function to use for #37
Adds OpenPGP info box to message header when reading email

Only contains key algo and creation date for now, will be expanded later.

Fixes #37
TODO clarification
Adds fingerprint to OpenPGP info box
Fixes bug which displayed OpenPGP info box twice (as decrypt() is called)
Merge remote-tracking branch 'upstream/master'