[fix bug 1067324] Custom snippet metrics.
Merge pull request #68 from glogiotatidis/metric-3

[fix bug 1067324] Custom snippet metrics.
Add travis.
Merge pull request #69 from glogiotatidis/travis

Add travis.
Update README.md
Update preview template to match fetch_snippets.html.
Stop hiding Client Match Rules on the snippet admin page.

Because Every time I open that section I wish I didn’t have to.
Merge pull request #74 from Osmose/stop-hiding-cmrs

Stop hiding Client Match Rules on the snippet admin page.
Upgrade factoryboy to version 2.4.1.
[fix bug 1082208] Support media files and CDN.