License text

[danielwbn]

Greetings! Would it be possible to add another license to your project, preferably MIT or BSD license?

Background:
I recently started working for TOPTICA Photonics and we would like to use your code. However, your zero-clause Guthrie license does not explicitly state that we may use and modify it, etc.

[hartytp]

yeah, we can accommodate that. I'll make it Apache unless anyone complains.

[hartytp]

If you submit a PR that changes the license to Apache then I will happily merge it