fboauth 6.x-1.5

The 1.5 release of FBOAuth includes minor feature improvements and bug fixes.

• #1554182 by milesw: Document alter hooks in API documentation.
• #1486984: Add hook_fboauth_properties_alter(), allowing other modules to extend mappable field types.
• #1441758 by darrylh and quicksketch: Support deauthorization requests from Facebook.
• #1462200 by darrylh: 'Connect' button image link raises a warning when used with HTTPS.
• #1466628 by Dave Reid: The fboauth_user_fields variable is not deleted in fboauth_uninstall().
• #1524892: Documentation incorrectly refers to "theme callback".
• #1337322: Option to not download profile pics with fboauth_create_user().
• #1451856 by hac441 and Dave Reid: PHP notice when attempting to bind e-mails to existing accounts.
• #1506604 by pfrenssen: Remove needless variable check from fboauth_block_view().
• #1441752 by darrylh: Provide link to connect a Facebook account from the user edit page.