fixes and changes for porting

- forward declaration of records
- fixes to projections
- drop record accessors (use projections instead)
- changes to names to disambiguate

tests/ForwardRecord.newt

@@ -0,0 +1,18 @@
+module ForwardRecord
+
+import Prelude
+
+record Point where
+  x : Int
+  y : Int
+
+instance Show Point
+
+
+instance Show Point where
+  show pt = show pt.x ++ "," ++ show pt.y
+
+
+main : IO Unit
+main = do
+  printLn $ MkPoint 1 2

tests/ForwardRecord.newt.golden

@@ -0,0 +1 @@
+1,2