Create how-to-use.html

Draft version
Added routing to show how-to-use
Added how-to-use menu item
Enable Admins to see the GDEs menu

Administrators need to have full access to all the features.
They can share test post and see how they get reported inside the GDEs UI
Small changes
Small changes P2
Formatting and typo fixes
Implemented issue #18
ops...
Merge pull request #38 from SmokyBob/feature_html5

Feature html5