Junk dactyl.{evalExpression,variableReference}.

Replace mappings.getMapLeader() with a mappings.mapLeader property.

pentadactyl/TODO

@@ -28,7 +28,8 @@ BUGS:
 FEATURES:
 9 Add quoting help tag
 8 Document Caret and Visual modes.
-8 finish :help TODOs
+8 make 'mapleader' an option
+8 replace global variables with plugin scoped user options
 8 fix local options
 8 adaptive timeout for auto-completions, :set completions can be updated more often than
   :open foo