Merge pull request #6 from darwink/master

Add feature of VehicleSales & PostSales ledger
Remove calculated columns in ledgers and fix typo
Merge pull request #7 from darwink/master

Add name column for DealerLedgerMetadata
Merge pull request #8 from darwink/master

Add displayName in getLedgerMetadata response
Merge pull request #9 from darwink/master

Add dealerID as parameter for query ledger
Merge pull request #10 from darwink/master

Add missing options in seeding data
Merge branch 'master' of https://github.com/Themis-J/Themis