cleanup of tests; use 'koch install' instead of 'install.sh' for a bootstrapping build

tests/compile/tgeneric2.nim

@@ -8,4 +8,8 @@ proc foo(models: seq[TX]): seq[int] =
   for model in models.items:
     result.add model["foobar"]
 
-
+type
+  obj = object
+    field: TTable[string, string]
+var t: Obj
+discard initTable[type(t.field), string]()

tests/reject/tenummix.nim

@@ -1,6 +1,6 @@
 discard """
   file: "system.nim"
-  line: 670
+  line: 695
   errormsg: "type mismatch"
 """