Enforcing store method types

• Using shapeless.HList instead of Tuple as building block for store method.
• Removed 22 field restriction for case classes used as record types.
• Added implicit macro machinery to verify arguments passed to the store method at compile time.
• Added more documentation.
• Added automated inference of BatchQuery debug strings to log batch statements.
• Re-wrote MergeList and QueryPart to use Seq as the underlying collection as we only perform append operations, improved query generation performance and API cleanliness.