Fix the README

Use the module name "ypromise" instead of "yui-promise".
Merge pull request #5 from okuryu/fix-readme

Fix the README
Improving package settings

* Move to new repository URLs
* Change Bower package name to "ypromise" as NPM package
Merge pull request #4 from okuryu/improving-package

Improving package settings
Remove mention to Promise.case in README
Update Bower version