Use NJAX installation from Bower.
Update NJAX to 0.9.1.
Merge branch 'develop'

* develop:
  Update NJAX to 0.9.1.
  Use NJAX installation from Bower.
Use PSR-4 autoloading.
Add missing bower.json file.
Use Gulp for updating to latest versions.
Added some docs.
Update NJAX to latest version.
Merge branch 'develop'

* develop:
  Update NJAX to latest version.
  Added some docs.
  Use Gulp for updating to latest versions.
  Add missing bower.json file.
  Use PSR-4 autoloading.