Adding getting started for cloud databases.
Fixing typos.
Fixing flavor ID; Using State constants class.
Merge pull request #307 from ycombinator/cdb-doc

Adding getting started for cloud databases.
Adding convenience method to test if object exists in container.
Merge pull request #309 from ycombinator/object-exists

Adding convenience method to test if object exists in container.
Modifying formatting/logic
Fixing wrong interface namespace