Address review comment: Document schema_store.
Address review comment: Document schema_store.

AndyHuu/flocker,lukemarsden/flocker,jml/flocker,wallnerryan/flocker-profiles,1d4Nf6/flocker,wallnerryan/flocker-profiles,achanda/flocker,hackday-profilers/flocker,hackday-profilers/flocker,agonzalezro/flocker,Azulinho/flocker,w4ngyi/flocker,AndyHuu/flocker,mbrukman/flocker,w4ngyi/flocker,LaynePeng/flocker,agonzalezro/flocker,agonzalezro/flocker,adamtheturtle/flocker,moypray/flocker,lukemarsden/flocker,1d4Nf6/flocker,jml/flocker,hackday-profilers/flocker,adamtheturtle/flocker,adamtheturtle/flocker,runcom/flocker,LaynePeng/flocker,AndyHuu/flocker,mbrukman/flocker,LaynePeng/flocker,Azulinho/flocker,jml/flocker,Azulinho/flocker,wallnerryan/flocker-profiles,runcom/flocker,mbrukman/flocker,achanda/flocker,lukemarsden/flocker,achanda/flocker,w4ngyi/flocker,1d4Nf6/flocker,moypray/flocker,moypray/flocker,runcom/flocker