Update bower.json version key to 0.5.0 and update README.md to indicate dependency on Polymer 0.5.5

Author: robbear

README.md

@@ -1,4 +1,8 @@
+Note: This release of this particular component requires an **older version of Polymer (v0.5.5)**.
+
+-----
+
 The organization of these web component files is tuned for the component's
 inclusion in other projects via [Bower](http://bower.io). If you'd like to run
 this component's demo on your own machine, please see these
-[instructions](https://github.com/basic-web-components/components-dev/wiki/Running-Basic-Web-Component-demos).
+[instructions](https://github.com/basic-web-components/components-dev/wiki/Running-Basic-Web-Component-demos).

bower.json

@@ -1,14 +1,14 @@
 {
   "name": "basic-list-box",
   "description": "A single-selection list box with highlighting and keyboard navigation",
-  "version": "0.0.1",
+  "version": "0.5.0",
   "license": "MIT",
   "main": "basic-list-box.html",
   "dependencies": {
-    "basic-selector": "basic-web-components/basic-selector#master"
+    "basic-selector": "basic-web-components/basic-selector#^0.5.0"
   },
   "devDependencies": {
-    "basic-framed-content": "basic-web-components/basic-framed-content#master"
+    "basic-framed-content": "basic-web-components/basic-framed-content#^0.5.0"
   },
   "keywords": [
     "basic-web-components",