Fix popovers, detail page title, and urls to the repo

* Add a container to the popovers so that they don't inherit the header
styling of their parents
* Update the title of the file page to use the short filename
* Update the path to the plato project
Merge pull request #45 from es-analysis/popover-container

Add container property to popovers, update detail page title, update urls to the plato repo
Merge branch 'master' of https://github.com/es-analysis/plato into feature-19-wall-display

* 'master' of https://github.com/es-analysis/plato:
  Fix popovers, detail page title, and urls to the repo
Add backwards compatibility fix for CasperJS test after Morris chart update

This preserves a previous behavior of clicking on an unspecified region
taking us to the last bar in the chart. This makes the casper overview
test work. Ideally the fix would be in the casper tests, but I’m
choosing the leave it unaltered in this version of Plato v1.