Started working on file uploads
Improvements in POSTRequestFilter

Fixed typos
Stream now opened for the temporary file
Merge branch 'master' into file-uploads
Merge remote-tracking branch 'origin/master' into file-uploads

Conflicts:
	src/Niysu/Filters/POSTRequestFilter.php
Merge remote-tracking branch 'origin/feature-input' into feature-fileuploads

Conflicts:
	src/Niysu/Input/POSTInput.php
Merge remote-tracking branch 'origin/master' into feature-fileuploads
Merge branch 'master' into feature-fileuploads
$stopRoute and $isRightResource now checked in the handler and after functions
An exception is now thrown in case of wrong JSON data
Merge remote-tracking branch 'origin/master' into feature-fileuploads
getRawData() no longer works when a file is uploaded
Contexts are no longer considered as filters
Added support for closures in @before
PHP parameters now working
Merge remote-tracking branch 'origin/feature-auth'
Fixes in SessionAuthContext
Another fix in SessionAuthContext
DatabaseService now uses persistent connexion
Fixed undefined offset: url
Fixed problems in SessionContext