Style fixes and added two new methods

[thecodeassassin]

Methods added:

• getDatabaseNames - Returns a list of the names of all the databases
• databaseExists - Checks if a database exists on the host/cluster

Components added:

• QueryBuilder - Abstraction class for generating common queries

Other changes:

• fixed return types

[thecodeassassin]

Are you still supporting this library?

[thecodeassassin]

I've added support for the 0.9 release in this PR