Add UserDailyContribs for external edit counters

UserDailyContribs enables easier implementation of edit counters
chronologically segmented. An example to use the API is found at
http://rawgit.com/whym/gdc/master/gdc.html?user=whym .

The extension is installed on Wikimedia wikis, so having it on TWN
serves for expectation of consistency.

Change-Id: I5da9da4a07194e0cf1ab80ccd2c48fe04aa6ae90
Merge "Add UserDailyContribs for external edit counters"