- Urgent fix to NTSL.

 Sanitizes the output of NTSL, including the broadcast() function.

 * Added a GetCleanVar to be used when getting a global variable to use inside the game code, it will sanitize() the variable if the compare argument is not equal to it; the compare argument should used to see if NTSL has changed the value.
 * Added a sanitize_data proc for the signal datum. It will sanitize all the data using strip_html_simple().