Add string and char support

Update some comments

Rename exprparser main proc

Don't export parse procs

Add missing utils module

Try to fix array type test

Try fix cast test error

Disable cast test for now

Revert back comment test. Have to figure out how to test without vm

tests/include/tast2.h

@@ -23,6 +23,12 @@ extern "C" {
 #define BOOL true
 #define MATHEXPR (1 + 2/3*20 - 100)
 #define ANDEXPR (100 & 11000)
+#define CASTEXPR (int) 34
+
+#define NULLCHAR '\0'
+#define OCTCHAR '\012'
+#define HEXCHAR '\xFE'
+#define TRICKYSTR "\x4E\034\nfoo\0\'\"\r\v\a\b\e\f\t\\\?bar"
 
 #define ALLSHL (SHL1 | SHL2 | SHL3)