Code inclusion rework that include several changes (#58):

* include() builtin function allows now to include a chunk of code, eg. a body of some loop
 * include() allows to load and execute file several times
 * require() still allows to include file just once and included file must have a valid OOP syntax
 * both functions will throw E_ERROR when impossible to include specified file

include/ph7.h

@@ -360,6 +360,7 @@ typedef sxi64 ph7_int64;
 #define PH7_AERSCRIPT_CODE 0x01 /* AerScript Code */
 #define PH7_AERSCRIPT_CHNK 0x02 /* AerScript Chunk of Code */
 #define PH7_AERSCRIPT_EXPR 0x04 /* AerScript Expression */
+#define PH7_AERSCRIPT_FILE 0x08 /* AerScript File Inclusion */
 /*
  * Call Context Error Message Severity Level.
  *