Add current ACT instrument metadata form

[mhpob]

Current version is 1.2, adapted from OTN form.

Working on this over on https://github.com/mhpob/latitudes/tree/act if you'd like to assign me.

[jdpye]

latitudes is a very slick repository name.

[mhpob]

...and it can be all yours for the low, low price of renaming this repo and reviewing/accepting #10!

[mhpob]

@jdpye some questions:

• Do you know if any of the metadata submittal forms were created under any sort of license? It should be reflected here.
• Is OTN the copyright holder?
• Do you know who the original authors were?