refs #192 - Added permission for generating invoices for projects
refs #192 - Added permission for generating invoices for projects

BocuStudio/django-timepiece,gaga3966/django-timepiece,dannybrowne86/django-timepiece,caktus/django-timepiece,gaga3966/django-timepiece,BocuStudio/django-timepiece,gaga3966/django-timepiece,arbitrahj/django-timepiece,dannybrowne86/django-timepiece,josesanch/django-timepiece,josesanch/django-timepiece,caktus/django-timepiece,dannybrowne86/django-timepiece,josesanch/django-timepiece,arbitrahj/django-timepiece,arbitrahj/django-timepiece,caktus/django-timepiece,BocuStudio/django-timepiece