Add quickstart at the top of the README

People at the trainings were sometimes very confused about the partial
instructions only available lower down the README, so I put a full
walkthrough at the top with a disclaimer that more detailed instructions
follow. Hopefully that should help people get started faster and use
the SDK more!
Merge pull request #10 from timanglade/master

Add full quickstart at the very top of the README
Merge branch 'master' of github.com:apigee/usergrid-javascript-sdk
Merge branch 'development' of github.com:apigee/usergrid-javascript-sdk
upped rev # to 0.10.5