Update index.md

Added info to update the database when working with Doctrine ORM
Merge pull request #71 from kivu8/patch-1

Update index.md
Update README.md
Invalidating cache by Ajax [angularjs]
moved invalidate cache btn into _ngGrid template
check ajax call
added few css classes
fixed special chars issue in translations and prevent error when tables not exist
removed ide files
get database resources through an event
updated mongodb user creation
swap quote
removed mongodb test user
fixed translator