XRead

To run type (in your terminal) either $ python XRead.py or $ python3 XRead.py, depending on whether you have python 2 or not, or $ chmod +x XRead.py and then $ ./XRead.py. You can also run it from Idle.
XRead works like a standard plain-text editor. Don't try and open OpenOffice or Microsoft Word files. It won't work. No RTF, ODT, DOCX, etc.

Web Editor

The web editor can be used as two things: Another application (in the command just replace XRead.py with XReadWeb.py) or an addon to XRead.py allowing you to use xml/html importing and exporting with the special tree style of writing. It works like this (notice the tabs and double spaces).
<a it='cheese'><b>text<c/></b>stuff<d><e>hmm<e/><f/></d>la</a>
would become to

Basically the system is
tagname '#' text '#' tailtext '#' {'attrib':'utes'}
with tabbification at the front specifying the depth. An emptier one would be
tagname '#' '#' '#' {}
(if ^ was a space character then tagname^'#'^^'#'^^'#'^{}
This is also descriptionribed in Help/Style in Web Editor or Help/Web Editor Style in standard XRead.