Update build file to 0.4
Fix datagrid edition link
Merge pull request #157 from marmelab/fix_datagrid_edition_link

[RFR] Fix datagrid edition link
Prepare 0.4 release
Merge pull request #159 from marmelab/prepare_04

[RFR] Prepare 0.4 release
Add link to 0.4 blog post in upgrade guide
Bootstrap protractor tests
Integrate protractor tests into Travis-ci and SauceLabs
Launch test with builded assets and update build
Remove log file and update builded assets