Update README.md

update links for git repo
Merge pull request #2 from ceeram/patch-1

Update README.md
Fix doc eg. code
Change RuntimeException usages to CakeException
Merge pull request #4 from ADmad/tweaks

Tweaks
Allow to override behavior for setFlash
Merge branch 'feature/version-3' of git://github.com/jippi/cakephp-crud into feature/version-3
Merge origin/develop
fix repo username to lowercase J