Updated the Java tutorial to include the new 2.6 features

Added how's for:
* Bulk operations
* Aggregation Cursors
* ParallelScan
* MaxTime
* Extend Indexes examples to show text indexing
* Add Geo Index example

Refs DOCS-3410

Signed-off-by: Sam Kleinman <samk@10gen.com>
Java tutorial corrections and clarifications

Signed-off-by: Sam Kleinman <samk@10gen.com>
DOCS-3410: whitespace