Add HTML5 support in ie10.

The current X-UA-Compatible compatibility header in place to avoid
dygraph breaking in IE8 actually force IE10 (and up) in IE9
compatibility mode, practically disabling some needed HTML5
functionalities (history.replaceState).

For editing and routing it use IE8 compatibility mode :-(
Uniformise shortcut icon
Fix keyword in routing
Fix routing meta description
Typo
Update Changelog
Fix layer order in tests
Merge pull request #752 from camptocamp/html-template

Add HTML5 support in ie10, litle fin in HTML templates