api: fix calebasse Event save (tastipye api change)
api: fix calebasse Event save (tastipye api change)

https://github.com/toastdriven/django-tastypie/commit/d850758b088761a00f60a474f5b2d683dc1ec3c0
http://stackoverflow.com/questions/15157071/tastypie-nested-resources-cached-obj-get-takes-exactly-2-arguments-1-given

ZTH1970/alcide,ZTH1970/alcide,ZTH1970/alcide,ZTH1970/alcide,ZTH1970/alcide