CSP file read failing fix

Edited CSP read function to use pystring to split, strip and format the lines being checked.

* Previously the (line != "CSPLUTV100") would error when reading a CSP.
  Writing was fine.
* I thought it would be better to match the pattern matching in other
  fileFormat source files.

Signed-off-by: Andrew Bunday <andrew.bunday@gmail.com>