Flatten directory/find entry point

[mrx23dot]

This contract has 14 files, no idea which one is the entry point: https://etherscan.io/address/0x44c3fab0ae93ac02ae7a218c51e8a0e5e64c34df#code

please add ability to take multiple files as input, with one output. Not sure what etherscan.io uses for this.