SCHEMA-150. Moved mayProceed to BaseTool and redirected cleanup exceptions.

Signed-off-by: Christophe Taton <taton@wibidata.com>
SCHEMA-202. Fix bug in KijiDataRequest javadoc.
SCHEMA-203. KijiDataRequestBuilder.addColumns() becomes .newColumnsDef().

Signed-off-by: Aaron Kimball <aaron@wibidata.com>
SCHEMA-203. Fix lingering javadoc example.
SCHEMA-150. Fix compiler error.
SCHEMA-150. Fix checkstyle.