added missing InheritanceLink
Merge pull request #878 from williampma/definite

added missing InheritanceLink
update directory path references due to renaming
Merge pull request #880 from AmeBel/compile-error

update directory path references due to directory renaming
postgres README updates
Add check for graphviz dependency in REST API
Merge pull request #882 from cosmoharrigan/rest

Add check for graphviz dependency in REST API