XKCD link and minor wording
Merge pull request #74 from Swader/patch-1

XKCD link and minor wording
optimize _scanSources
Update acl.rst
Update db.rst
Update events.rst
Update intl.rst
Merge pull request #75 from xboston/patch-10

optimize _scanSources
Merge pull request #76 from xboston/patch-11

Update acl.rst
Merge pull request #77 from xboston/patch-12

Update db.rst
Update micro.rst
Merge pull request #78 from xboston/patch-13

Update events.rst
Merge pull request #79 from xboston/patch-14

Update intl.rst
Update models.rst
Update models-cache.rst
Update phql.rst
Update tags.rst
Update tutorial-invo.rst
Update validation.rst
Update views.rst