1.2.0

Added /xml route - saves passed data with "application/xml" content type
Added /json route - saves passed data with "application/json" content type
Added /csv route - saves passed data with "text/csv" content type
Added /xlsx route - saves passed data with "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" content type
Added file-name param for all routes
Added pdf-width, pdf-height params for /pdf route
Fixed /pdf route bugs with complex charts export