Password manager

**Note: only applies to 0.6.1-SNAPSHOT **

You can optionally cache passwords - two tasks make use of this: android:github-upload/delete and android:sign-release.

settings = General.androidFullProjectSettings ++ PasswordManager.settings ++ Seq (
  ...
  cachePasswords in Android := true
)

To clear the passwords use android:clear-passwords. Passwords are stored in the keychain (on OSX) and in ~/.sbt/sbt-android-plugin-passwords on all other systems.

Note: Be aware of the security risk - passwords are stored in clear text (not on OSX)