GDE User Guide - Doc

[SmokyBob]

From old repo
Create a Guide for new GDEs on How to Use the app at it's fullest.

Draft list of features to explain:

How to tag Posts to be recognized by the app
Why edit the activities
Explain Impact formula and why
How to Edit activities
Explain Merge, Trash and Delete
Common Problems/ Report issues
"Only GDEs and Admin can edit data" -> Google + account email <> account.email
Open GitHub issue with debug info from the Chrome Dev Tools

[reicek]

Same as #82

Closing this one