added grant and revoke APIs to accesss documents by single users. Improved performance on collection checks
fixed #16
fixed #36
Added the guessing of the content type if not present among the POSTed headers

Fixed #26
fixed #41
added the api to give to the admin the possibility to set configuration values. It is /admin/configuration/:section/:subSection/:key/:value
check the presence of the '%' at the end of the specified format
ignore the autogen cerficate for ssl protocol
manage to use the connection pool. fixed #22
Merge pull request #1 from baasbox/master

update from baasbox repo