Make rake jasmine:ci run specs correctly.

- Will replace rake core_specs.
- Remove obsolete dependencies & files -- most of these were for build tasks we
  are no longer using. Notably, rspec and spec_helper were deleted.

spec/node_suite.js

@@ -169,10 +169,10 @@ process.argv.forEach(function(arg) {
 specs = [];
 
 if (perfSuite) {
-  specs = getFiles(__dirname + '/performance', new RegExp("test.js$"));
+  specs = getFiles(__dirname + '/javascripts/performance', new RegExp("test.js$"));
 } else {
-  var consoleSpecs = getSpecFiles(__dirname + "/console"),
-      coreSpecs = getSpecFiles(__dirname + "/core"),
+  var consoleSpecs = getSpecFiles(__dirname + "/javascripts/console"),
+      coreSpecs = getSpecFiles(__dirname + "/javascripts/core"),
       specs = consoleSpecs.concat(coreSpecs);
 }