Manage pdfs  - Added the gem 'pdf-forms' for working with PDF forms.  - Added the gem 'combine_pdf' for the union of several pdfs.
Manage pdfs
 - Added the gem 'pdf-forms' for working with PDF forms.
 - Added the gem 'combine_pdf' for the union of several pdfs.

macarci/cenit,macarci/cenit,cenit-io/cenit,cenit-io/cenit,cenit-io/cenit,cenit-io/cenit,macarci/cenit