Fixed display of ClassBreakInfos
Added Legend info to MapServer

- Closes #28
- Added function to generate unique element names.
Merge branch 'master' of https://github.com/AmrEldib/Shepherd

# By Amr Eldib
# Via Amr Eldib
* 'master' of https://github.com/AmrEldib/Shepherd:
  Added Legend info to MapServer
  Fixed display of ClassBreakInfos