Add remember the milk support (merge request)

[Luca Invernizzi]

Please review my merge request for the remember the milk plugin.
RTM support is discussed in bug #320252, but I couldn't add the "toreview" tag commenting on the bug, so I'm opening a new one.
To test the plugin properly, bug #428148 should be triaged first.

In my branch, apart from the plugin itself, I've added two properties to the Task model: an uuid (since the current tid can be reused by a new task when an old one is canceled) and a modification time (needed for any syncing plugin, since it is necessary to compare task modification times to choose the newest).

[Luca Invernizzi (invernizzi)]

I forgot to mention that this is the merge request: https://code.edge.launchpad.net/~gtg-user/gtg/rtm-sync-plugin/+merge/11633

[Luca Invernizzi (invernizzi)]

I'm an idiot :-) I figured out how to add the tag "toreview" to bug #320252, but I suppose that now it's too late. I should fill a bug to launchpad "make bigger buttons"

[Lionel Dricot (ploum-deactivatedaccount)]

I believe that this bug can be closed as RTM support plugin is now in trunk. Feel free to reopen if I'm wrong. Thanks a lot Luca, for making us a competitor to Tasque :-)