Release version 1.2.

Changes:
 - Added a new feature where a user can choose to have the text within the 'Enter Passphrase' textbox be masked. This feature is disabled by default and is enabled from the Options page for the add-on entry in the Firefox Add-On Manager.
 - Added a new feature where users can choose to have the Phrase field cleared whenever the page within the active tab reloads. This feature is disabled by default and is enabled from the Options page for the add-on entry in the Firefox Add-On Manager.
 - Added a new feature where a user can choose to have the text within password character buttons be masked. This feature is disabled by default and is enabled from the Options page for the add-on entry in the Firefox Add-On Manager.