Orientation/Learning Documentation

The code in this pull request comprises of two parts:

1. Documentation as orientation or learning material. Some in class and class-feature note clauses and others in NOTES.txt (which--at it turns out--is not going to be my ultimate suggestion, but simply where we started).

2. Some changes I needed to get EWF to run on my local machine.

Should it be  l_html_response, or l_html_body, or l_html_response_body
For me, the initial code using `s' and then l_message.set_body (s)  was ok, but on the other hand I was the author, so my point of view may not be objective.

Using l_message instead of `mesg' is an improvement I agree.