Changes

'''Questions and Help''': Add-on developers can get help in the mozilla.dev.apps.thunderbird newsgroup (the traditional venue) or in maildev mailing list. (see [[Thunderbird/CommunicationChannels#If_you.27re_a_developer]] Please [[Thunderbird/CommunicationChannels#If_you.27re_a_developer|These forums have more people available to help you than bugzilla and other locations, so please ask there]] in a forum before filing a bug report in bugzilla, because these forums have more people available to help. And also test and fix your add-on using the latest [http://www.mozilla.org/thunderbird/channel/ beta version] of Thunderbird.