Merge pull request #157 from aseemmittal/dirty

Bill rendered properly
django-ajax-selects and django-suit implemented.
static files for django-ajax-selects
lookup modified.
Merge pull request #158 from jasvir99/dirty

django-ajax-select and django-suit implemented succesfully.
adding filter in lookup to select only non admin user.
Merge pull request #159 from jasvir99/dirty

adding filter in lookup to select only non admin user.
control panel markup added
added duplicate action to admin form for products
added products_list for printing
improved css
little bit tinkering with css