First draft of PRIVACY.md

* Mostly covered from USO with a few additions/changes

Applies to #116
Use bullets instead of headers

Applies to #116
Typo and expansion

* Typo fixered
* Expansion of LSO

Applies to #269
Don't need a colon on Ads

Applies to #269
Merge pull request #269 from Martii/Issue-116LEGAL

Issue 116 legal