Update README.md

Merge pull request #2 from Jeloo/gaProfileFix

Add GA client id cookie key to Settings, improve the example script

Improve the interface of http client

Create analytics helper for getting google client id

Update README.md

Update README.md

Update README.md

Update README.md

Update README.md

Create README.md

Provide a simple example

Separate client implementation from resource

Separate client implementation from resource

Provide php 5.3 compability