Merge pull request #22 from maximebf/master

dashboard: action input can be prefilled with data
Merge pull request #23 from maximebf/master

dashboard: refactoring
[+] update leafo/lessphp version since the branch alias have change
Merge branch 'master' of https://github.com/mpoiriert/nucleus
[+] ServiceContainer warm up system
[+] warmup of twig file template
Merge pull request #24 from maximebf/master

dashboard
fixed bug in dashboard where input was determined on data length
debugbar: added open handler controller
dashboard: bug fix with function constructor
dashboard: affix toolbar and history support in pagination
dashboard: inline editing
dashboard: bug fix with table overflow, html escaping in table,better control on field visibility
dashboard: fixed bug when using force_input in Dashboard.Action
added support for packages in asset manager