Update UAA-APIs.rst

Added an example on how to query for the existence of a specific username. It took me quite some time to figure out how to format the query.
Remove CloudFoundry.com and Cloud Foundry references. [Fixes #56147062]
Merge pull request #55 from bitbender/patch-1

Update UAA-APIs.rst
Merge remote branch 'upstream/master'
Update UAA-APIs.rst to include valid JSON examples

Closes #63

Signed-off-by: Zach Robinson <zrobinson@pivotallabs.com>
bundle update sample login app

GitHub issue #56

Signed-off-by: Julz Friedman <julz.friedman@uk.ibm.com>
Merge pull request #62 from fhanik/master

Remove CloudFoundry.com and Cloud Foundry references. [Fixes #56147062]
Merge branch 'master' into develop