• Add airdrop module to record giveaways in Mandala Testnet (#120)
• First version of liquidator implemented with offchain worker (#111)
• Update Substrate to commit 41bb2193a267805e2093a081bc3e2aaccc64283a (#123)
• Update storage hasher to allow iterate both storage key and values (#123)
• Emit events on internal transfer (ORML#97)
• Make oracle feed value transactions free (ORML#86)
• Various bug fixes