Further test improvements (2)

[Jpnock]

From @Fiwo735 (#9)

• Improved Python testing, making it the default and recommended testing option.
• Removed duplicated test case (same functionality as _example)
• Updated AST diagram to the new version

From @Jpnock (#17)

• Refactors the test script in an attempt to reduce cohesion
• Ignores coverage and pycache files in git
• Attempts to always output a valid JUnit XML file
• Escapes XML attributes and values to prevent test results corrupting the XML output
• Unifies the two ways of counting passes and fails into one method for consistency (previously group names, folders, test names or test logs containing the phrase Pass would lead to a test being marked as passing in short mode)
• As for coloarma, I've tested on both Linux, Mac and WSL and colours seem to work fine without this dependency. Did we see a user reported bug for this? If so, it's fine to just revert 4f42126.
• Bumps the script version number

[Jpnock]

Hmm this seems like a bad merge, give me a sec

[Fiwo735]

Hmm this seems like a bad merge, give me a sec

Yeah just noticed something weird going on

[Jpnock]

Fixed.

EDIT: for some reason it looks like it's only carried over the code changes and not the docs changes from #9 I will cherry pick these.