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/javascripts/support/jasmine-performance.yml

@@ -0,0 +1,14 @@
+src_dir:
+  - 'src'
+src_files:
+  - '**/*.js'
+boot_dir: 'spec/javascripts/support'
+boot_files:
+  - 'dev_boot.js'
+helpers:
+  - 'helpers/**/*.js'
+spec_files:
+  - 'performance/performance_test.js'
+spec_dir:
+
+