Rename "compiler" functionality to Evaluator

Allows for stdin input for evaluation when no input file is provided.

src/FileEval.hs

@@ -0,0 +1,19 @@
+module FileEval where
+
+import Eval
+import Library
+import Parser
+import Research
+
+import System.IO
+
+import qualified Data.Map as Map
+
+evaluateFile :: FilePath -> IO T
+evaluateFile filePath = do
+  contents <- readFile filePath
+  let asts = parseTricu contents
+  let finalEnv = evalTricu library asts
+  case Map.lookup "__result" finalEnv of
+    Just finalResult -> return finalResult
+    Nothing -> error "No result found in final environment"