API docs fix for #563
API docs fix for #540
fixes issue #563 

Michael OTS review
API docs fix for #554
Fix for API docs #210
Clarifications for contains API func
a fix to replace.yaml
fixed 3rd replace example
merged change on typeof from next
adds sindex support in js/py drivers (#553)

Be wary though. The feature thus supported may no actually work.
Merge branch 'next' into driver_secondary_index_support
Merge branch 'next' into sam_207