Allow use of contract filepath for gen deploy #5
Description
When generating a deployment script it would be nice to allow users to specify the filepath of the contract or the contract name. Right now it looks like it assumes the contract will be in the src dir.
Example, I created a mock contract that I wanted to deploy to a local fork. The contract lived outside src but in the test dir. When I run `treb gen deploy [contract]' I get contract not found error.
