add: documented pasm_run_script function

include/pasm.h

@@ -2,4 +2,9 @@
 #include <stdlib.h>
 #include <stdio.h>
 
+/* filename: path of the pasm script, will use file argument if NULL                    */
+/* file: char** containing the lines of a pasm script, will be used if filename is NULL */
+/* lines: number of lines in the file argument, will be used if filename is NULL        */
+/* _fstream: file descriptor for the output (can be a socket), default: stderr          */
+/* return value: nonzero if an error occurred                                           */
 int pasm_run_script(const char *filename, char **file, size_t lines, int _fstream);