added names to calendar (in shifts and employee models)
cleaned up layout (removed scripts and other functions in calendar not needed)
fixed sources for javascript/css and added images for dhtmlx
Merge branch 'manager_cal'

* manager_cal:
  fixed sources for javascript/css and added images for dhtmlx
  cleaned up layout (removed scripts and other functions in calendar not needed)
  added names to calendar (in shifts and employee models)