most of hash map - have to commit fix for unify type first

stdlib/parser.krak

@@ -5,6 +5,7 @@ import tree:*
 import vector:*
 import stack:*
 import map:*
+import hash_map:*
 import util:*
 import string:*
 import mem:*
@@ -405,6 +406,7 @@ obj parser (Object) {
 obj gss (Object) {
     var data: vector<vector<*tree<int>>>
     var edges: map< pair<*tree<int>, *tree<int>>, *tree<symbol> >
+    /*var edges: hash_map< pair<*tree<int>, *tree<int>>, *tree<symbol> >*/
 
     fun construct(): *gss {
         data.construct()