Adds some flat design badges.
Adds some flat design badges.

GetAmbassador/django-cachalot,dan-passaro/django-cachalot,pombredanne/django-cachalot,BertrandBordage/django-cachalot,GetAmbassador/django-cachalot,dan-passaro/django-cachalot,pombredanne/django-cachalot,BertrandBordage/django-cachalot