[test][xs]: disable one of new transform tests broken by reversion in 06cd776ad9931251fa1b45a9802cb842438cf4be.
[util][s]: pipeline parser now provides options for none op (o/w none op broken!).
[refactor][s]: refactor so transform.transform takes a stream not a url.
[cli][m]: substantial improvements to command line.

* support for file paths - fixes #112
* support for stdin
* change structure of command line arguments (simpler, better!)
* add decent docs including listing of all the operations