utility package used by raid apps, get balances of an ERC20 token. Parses all transactions on the contract and calculates balance.

single function package, accepts:

• contract: address of the contract
• rpc: RPC address, defaults to homestead
• startBlock: block number to start at, defaults to 0
• endBlock: block number to end at, defaults to latest
• data : add the resultant balance to an existing object (ideally one returned by the same function in the past) by passing it here
• paginateLimit: number of blocks to search for in one call. pass 0 to search all blocks. defaults to 0.
• logProgress: boolean, if true, prints progress to get-erc20-balances.log in the current directory. defaults to false.