Feature #481 - color should follow rc order

- Added feature #481, allowing for user control of the color rule order
  of precedence via the 'rule.precedence.color' configuration variable.
- Color rules now obey the rc.search.case.sensitive configuration option.
- The color.keyword.XXX color rule now applies to annotations too.

src/Context.cpp

@@ -125,8 +125,6 @@ void Context::initialize ()
   if (locale != "")
     stringtable.load (location.data + "/strings." + locale);
 
-  // TODO Handle "--version, -v" right here?
-
   // init TDB.
   tdb.clear ();
   std::vector <std::string> all;