Laid foundation for modifiers and built a couple.

tests/testmodifiers.jet

@@ -0,0 +1,10 @@
+#!../jet-2.0
+<jet>
+ <set name="tester1" value="this is a test of the hex conversion." />
+ <set name="tester2" value="$[tester1;tohex]" />
+1) $[tester1;tobinary]
+2) $[tester1;tohex]
+3) $[tester2;fromhex]
+4) $[tester1]
+5) $[tester2]
+</jet>