SCHEMA-454. Log kiji-schema client version when opening instances/tables.

- Improve documentation for KijiURI fields.
- Remove unused constructors in HBaseKiji and HBaseKijiTable.
- Improve behavior and logging in HBaseKijiTable constructor.
- static HBaseKijiTable.createHTableConnection() becomes member openHTableConnection().
- Improve logging in Kiji.createTable()

issue: https://jira.kiji.org/browse/SCHEMA-454
review: https://review.kiji.org/r/748