Move to grunt for building all distribution files.

* canonical version number of jasmine-core is now is package.json
* `grunt buildDistribution` builds jasmine.js, jasmine-html.js, jasmine.css and outputs them to the dist dir
* `grunt buildStandaloneDist` builds the example spec runner files and compresses them to dist/jasmine-VERSION.zip
* `grunt compass` compiles jasmine.css
* jasmine.Env handling of version is backwards compatible, but uses the version string directly (and nicely deprecated)
* Ruby/thor tasks that did the above deleted

grunt/config/concat.js

@@ -0,0 +1,33 @@
+module.exports = {
+  'jasmine-html': {
+    src: [
+      'src/html/HtmlReporter.js',
+      'src/html/HtmlSpecFilter.js',
+      'src/html/ResultsNode.js',
+      'src/html/QueryString.js'
+    ],
+    dest: 'lib/jasmine-core/jasmine-html.js'
+  },
+  jasmine: {
+    src: [
+      'src/core/base.js',
+      'src/core/util.js',
+      'src/core/Spec.js',
+      'src/core/Env.js',
+      'src/core/JsApiReporter.js',
+      'src/core/Matchers',
+      'src/core/PrettyPrinter',
+      'src/core/Suite',
+      'src/core/**/*.js',
+      'src/version.js'
+    ],
+    dest: 'lib/jasmine-core/jasmine.js'
+  },
+  options: {
+    process: {
+      data: {
+        version: global.jasmineVersion
+      }
+    }
+  }
+};