Use XML library instead of or in addition to Regular Expressions

[oxr463]

See: https://github.com/tiran/defusedxml

[neverrend]

Ok. I will make a branch and get this started.

[oxr463]

I think it would just make working with the code much easier.

[neverrend]

See Branch: https://github.com/neverrend/XMLChecker/tree/xmlparser_feature

[neverrend]

TODO:

• Need to add \<checklistflaw>\</checklistflaw> remover
• Need to add code block counting & comparison against the counts
• Need to figure out an output the will be straight forward/easy to understand
• Count Step#s to ensure no mis-numbering are getting through
• More to come...

See:

• https://pypi.org/project/defusedxml/#defusedxml-elementtree
• https://docs.python.org/3/library/xml.etree.elementtree.html
• https://stackoverflow.com/questions/43589769/python3-parse-xml
• https://www.datacamp.com/community/tutorials/python-xml-elementtree