Remove gulp-shell plugin, use shelljs
Remove rimraf gulp plugin, use shelljs
Remove plugins folder
Update gitignore, add plugins folder
Add build-for-device gulp taks
Fix
Update karma config
Fix karma gulp task
Update dependencies
Merge branch 'gulp-config' into develop

* gulp-config:
  Update dependencies
  Fix karma gulp task
  Update karma config
  Fix
  Add build-for-device gulp taks
  Update gitignore, add plugins folder
  Remove plugins folder
  Remove rimraf gulp plugin, use shelljs
  Remove gulp-shell plugin, use shelljs