Merge pull request #22 from gguerrero/master

Pack register in one call
Merge pull request #24 from gguerrero/master

Strip more the register sources function
Merge pull request #25 from gguerrero/master

Update isInternal function for IE
Merge pull request #26 from gguerrero/master

Fix rspec test for properties host
Merge pull request #27 from gguerrero/master

Remove 'source' tracking to not overload cookies data
Merge pull request #28 from gguerrero/master

Refactor first touch timestamp for using cookies and not more 'get_property'!
Add tracked form tag helper
Merge pull request #29 from kelkoo-services/tracked_form_tag

Add tracked form tag helper
Upgrade version and CHANGELOG