Feature request: Filtering and piping

[drekka]

Something I'm trying to do on some of our client projects is slice through a code base to reveal the size of various features. To help with this I'd like to request some new features:

• To be able to do masked or regex file selection arguments. ie to do things like /**/*claims.*.
• To be able to do masked or regex excludes.
• To be able to pass the files and paths to read from another process. For example find . - name Claim* | tokei