Created knowledgeDB client base. Does not yet allow for queries, but should start a connection. Also put intelliJ project files in gitignore.
Modified KnowledgeDBClient. Added methods for executing single and queries parameterized queries.

Added Queries class for the queries.

Added Row class for parsing a row from a ResultSet.

Added comments for all classes.
Added missing Row class.
Added and fixed missed/bad comments.
Fixed some comments found by Arjen.