toning down some things

hy/lex/states.py

@@ -135,7 +135,7 @@ class Map(State):
             self.nodes.append(_resolve_atom(self.bulk, self))
 
         if (len(self.nodes) % 2) != 0:
-            raise Exception("Hash map is fucked")
+            raise LexException("Hash map is screwed up")
 
         ret = HYMap({})
         i = iter(self.nodes)

hy/lex/tokenize.py

@@ -7,5 +7,5 @@ def tokenize(buff):
     m = Machine(Idle)
     m.process(buff)
     if type(m.state) != Idle:
-        raise LexException("End of file.")
+        raise LexException("Reached end of file before we were done parsing")
     return m.nodes