Fixed source code URL
fixed OpenCog
Edited Andy's comments for the history section.
wording update on join and parallel execution
wording change on system architecture.
Fixed the Query Interface wording.
Fixed wording.
Small wording changes and added citations.
Addressed comments from Dr. Pavlo. Added new sections including concurrency control, joins, logging, and system architecture and organization.
Initial revision.
Embeds
Sys arch
Updated info
Data Model
Changed location
Added more info