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.

Gemfile

@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 gem "jasmine", :git => 'https://github.com/pivotal/jasmine-gem.git'
-#gem "jasmine", path: "/Users/pivotal/workspace/jasmine-gem"
+# gem "jasmine", path: "/Users/pivotal/workspace/jasmine-gem"
 unless ENV["TRAVIS"]
   group :debug do
     gem 'debugger'
@@ -8,3 +8,5 @@ unless ENV["TRAVIS"]
 end
 
 gemspec
+
+gem "jasmine_selenium_runner", :git => 'https://github.com/jasmine/jasmine_selenium_runner.git'