moved the coffeescript extension over from .cs to .coffee -- let's leave C# in peace. Changed array comprehensions to always return their mapped result, even when unassigned

test/fixtures/execution/test_everything.coffee

@@ -0,0 +1,27 @@
+func: =>
+  a: 3
+  b: []
+  while a >= 0
+    b.push('o')
+    a--.
+
+  c: {
+    "text": b
+  }
+
+  c: 'error' unless 42 > 41
+
+  c.text: if false
+    'error'
+  else
+    c.text + '---'.
+
+  d = {
+    text = c.text
+  }
+
+  c.list: l for l in d.text.split('') if l is '-'.
+
+  c.single: c.list[1, 1][0].
+
+print(func() == '-')