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/helpers/BrowserFlags.js

@@ -0,0 +1,23 @@
+(function(env) {
+  function browserVersion(matchFn) {
+    var userAgent = jasmine.getGlobal().navigator.userAgent;
+    if (!userAgent) { return void 0; }
+
+    var match = matchFn(userAgent);
+
+    return match ? parseFloat(match[1]) : void 0;
+  }
+
+  env.ieVersion = browserVersion(function(userAgent) {
+    return /MSIE ([0-9]{1,}[\.0-9]{0,})/.exec(userAgent);
+  });
+
+  env.safariVersion = browserVersion(function(userAgent) {
+    return /Safari/.exec(userAgent) && /Version\/([0-9]{0,})/.exec(userAgent);
+  });
+
+  env.firefoxVersion = browserVersion(function(userAgent) {
+    return /Firefox\/([0-9]{0,})/.exec(userAgent);
+  });
+
+})(jasmine.getEnv());