updated proto file
Ostensibly adds tagged indexes.

It's untested right now. Next up is driver support.
Tagged indexes are now passing cursory tests.
adding x_stress script for testing the x workload
fixing up the x_stress client
minor x_stress changes
Fixes several bugs in tagged indexes.

They now seem to work correctly.
fixing up x_stress and workloads
Merge branch 'next' into grey_issue_1369
fixing nested objects in x_stress workload
removing old stress client, replacing it with x_stress client
forgot to add the main stress script
removing old stress client client script
removing extra imports in the stress client
Replace tags with multi. Support in rb and js.

RB and JS pass smoke tests now.
fixing arr2 in stress client write workload
Merge branch 'next' into grey_issue_1369
Adds a gitignore.
Fix a bug in python driver.
Fix some regression tests that were made incorrect.