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
Merge remote-tracking branch 'origin/master' into feature-fileuploads
getRawData() no longer works when a file is uploaded