Add documentation about using PostgreSQL JSON column type
Add documentation about using PostgreSQL JSON column type

pacso/statesman,image-tester/statesman,eljojo/statesman,image-tester/statesman,gocardless/statesman,pacso/statesman,mkcode/statesmin,div/statesman,timothyp/statesman,gocardless/statesman,eljojo/statesman,mmontalvo/statesman,timothyp/statesman,div/statesman,mmontalvo/statesman