add angular animate library, this library will handle most of the required animations.
---- Home module ----
Integrate user analytic API method
remove unnecessary code, and adapt the simple dashboard
==practice module ===
Fix navigation problem between the differents question types
change styles in templates

===Angular==
update angular library
Add question types templates this is new before were in the same main page.
Add styles to make video explain responsive.
Fix some selectors in the directives, still improving it.
Merge pull request #4 from joanrm20/master

CodeUpdate