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/compress.js

@@ -0,0 +1,57 @@
+var standaloneLibDir = "lib/jasmine-" + jasmineVersion;
+
+function root(path) { return "./" + path; }
+function lib(path) { return root("lib/jasmine-core/" + path); }
+function dist(path) { return root("dist/" + path); }
+
+module.exports = {
+  standalone: {
+    options: {
+      archive: root("dist/jasmine-standalone-" + global.jasmineVersion + ".zip")
+    },
+
+    files: [
+      { src: [ root("MIT.LICENSE") ] },
+      {
+        src: [ "jasmine_favicon.png"],
+        dest: standaloneLibDir,
+        expand: true,
+        cwd: root("images")
+      },
+      {
+        src: [
+          "jasmine.js",
+          "jasmine-html.js",
+          "jasmine.css"
+        ],
+        dest: standaloneLibDir,
+        expand: true,
+        cwd: lib("")
+      },
+      {
+        src: [ "boot.js"],
+        dest: standaloneLibDir,
+        expand: true,
+        cwd: lib("boot")
+      },
+      {
+        src: [ "SpecRunner.html" ],
+        dest: root(""),
+        expand: true,
+        cwd: dist("tmp")
+      },
+      {
+        src: [ "*.js" ],
+        dest: "src",
+        expand: true,
+        cwd: lib("example/src/")
+      },
+      {
+        src: [ "*.js" ],
+        dest: "spec",
+        expand: true,
+        cwd: lib("example/spec/")
+      }
+    ]
+  }
+};