ERC-1132 Extending ERC20 with token locking capability

StagnantERCcreated 2018-06-03

Author: nitika-goel

Functions this standard introduces (8)

`0xa9dab167`	`extendLock(bytes32,uint256)`
`0xab4a2eb3`	`getUnlockableTokens(address)`
`0x81fc4d90`	`increaseLockAmount(bytes32,uint256)`
`0x2e82aaf2`	`lock(bytes32,uint256,uint256)`
`0x179e91f1`	`tokensLockedAtTime(address,bytes32,uint256)`
`0x5294d0e8`	`tokensUnlockable(address,bytes32)`
`0x4b0ee02a`	`totalBalanceOf(address)`
`0x2f6c493c`	`unlock(address)`