Made $[%name] to retrieve keyword values in a tag. Has bugs.

tests/testvar.jet

@@ -1,6 +1,6 @@
 #!../jet-2.0
 <jet name1="localhost" filterblanklines="true" trimlines="true">
-<set name="test1" value="#[name1]" />
+<set name="test1" value="$[%name1]" />
 test1=[$[test1]]
 <set name="ix" value="1" />
 <set name="letterx" value="x" />
@@ -8,7 +8,7 @@ test1=[$[test1]]
 <set name="1var1" value="This is another test" />
 <set name="var1var" value="Yet another test" />
 <set name="var11" value="it seems to work." />
-name1=[#[name1]]
+name1=[$[%name1]]
 $[$[ix]var$[ix];tobinary]
 $[var$[ix]]
 $[var$[ix]var]