backoffice application
remove bower and add Ink framework to static files
ssue959-add-test-certificate-generation
issue959 repair bad commit on template course.html
issue959 add  TEST_ to certificate filename
#982: restrict backoffice to group fun_backoffice's users
#959 Use string interpolation to build file name
issue959 move make_teachers_list function to form.py
issue959 remove bad decorator in function generate_certificate
#959 display Django framework messages
issue959 introduce django messages instead of raising 404
Merge pull request #27 from openfun/jpaille/issue959-add-test-certificate-generation

#982 Backoffice application
#959 add test certificate generation
 #982 remove some useless static files
#982: change Ink css to allow preprocess by djangostaticfiles
Merge pull request #29 from openfun/jpaille/issue959-add-test-certificate-generation

#982: change Ink css to allow preprocess by djangostaticfiles and remove useless static files from backoffice application
issue959 add message error when univerisity is not found
issue959 change error message to warning
issue959 replace double quotes by single quote
#982 i18n
issue959 fix unicode bug