Support multiple input files

[zeroZshadow]

Supporting *.proto as input instead of only single files will make this tool much easier to use.

[hultqvist]

It should already support that as far as it supports multiple .proto as arguments and it's usually the shell that expands the wildcard syntax rather than individual applications.

[zeroZshadow]

On windows, cmd, it does not allow this (while protoc does)

[hultqvist]

No flag for this feature, always on.

Let me know how it works