Add docs linked from help page

I linked these docs form the help page pointing to a 404 and this takes care of adding some rather bare content so we have something up and running for a release.

docs/faq.md

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+**What is LibreTime?**
+
+LibreTime is a community managed fork of the AirTime project.
+
+It is managed by a friendly inclusive community of stations 
+from around the globe that use, document and improve LibreTime. 
+
+**Can I upgrade to LibreTime?**
+
+In theory you can update any pre 3.0 version of AirTime to
+LibreTime 3.0.0 and above. 
+
+LibreTime is complex software, as such it is close to impossible
+to guarantee that every upgrade path works as intended. This
+means you should trial the update on a parallel test 
+infrastructure to minimize possible downtime.
+
+Please let the community know if you encounter issues with the
+update process. 
+
+**Why did you fork AirTime?**
+
+See this [open letter to the Airtime community](https://gist.github.com/hairmare/8c03b69c9accc90cfe31fd7e77c3b07d).

docs/translating.md

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+While LibreTime is translatable software, it does not yet have a translation interface.
+
+Please [let us know](https://github.com/LibreTime/libretime/issues/new) if you want 
+to contribute to the translation effort so we can prioritize setting such an interface.