RUBY-787 Adding bulk index to operations
RUBY-787 Splitting list of indexes when batching
RUBY-787 Only reference index batches if they exist
RUBY-787 Add indexes on results from bulk operations
RUBY-787 Aggregate write errors for bulk operations
RUBY-787 Bulk insert write error aggregation
RUBY-787 Write command writeErrors aggregation
RUBY-787 aggregate write errors for update and delete bulk op results
RUBY-787 Cleanup #make_response method
RUBY-787 n_modified is always nil for bulk updates on legacy servers
Merge pull request #505 from estolfo/bulk-2

Index bulk operations and aggregate write errors in results