Add licenses

[e-lo]

As a TIDES-Stakeholder, I need to know which license the TIDES data standards suite is licensed under in order to discern if it is appropriate for my use cases and if I should contribute to it.

[jlstpaul]

My instinct is to use the MIT license unless there is some objection.

[themightychris]

@jlstpaul my default used to be MIT, but best practice for permissive licenses seems to have shifted towards Apache2 being a better default.

Apache2 is essentially just as permissive, but makes a few legal things more explicit that make it easier for institutions that have to care about managing legal risks to participate in using and publishing software under the license:

• making it explicit that if the author owns any patents covering the code, license to use the patents is granted too (e.g. so you can't get sued for using MIT licensed code that is also covered by patents)
• making it explicit that license to use any trademarks owned by the author is not granted (e.g. someone using a Caltrans-published tool couldn't publish their own version with Caltrans' logo still included)
• derivative works need to document for their users what they changed on top of the upstream project

[botanize]

That sounds good to me, it also matches GTFS spec licensing, which has a very similar set of use cases.