No Generator class

[lukew3]

Will close #397

Not sure if this should be merged. See "Should this be merged?" section

What's in this pr

• Removes generator class instantiation
• Moves generator functions out of their own separate files and into their subject files
  • Removed func/<subject> directories and put generator functions in <subject>.py
• ids are stored in ids.txt
  • Genlist is generated from this list
• Added documentation created with pdoc

Should this be merged?

Pros:

• Uses pdoc html instead of large github table
  • Github table currently takes a long time to load but may be easier to look at
  • Could do an entire other pros/cons of github readme vs pdocs
• More conventional library structure?
• Contributors don't have to manually determine id
  • Could just add the ids.txt file to current version to have this pro without the rest

Cons:

• Many generator functions in each subject file
  • May be difficult to find a function
  • Would be easier to add nested subjects if each function is placed in nested subject folders instead of subject files.
• Doesn't seem to offer significant speed improvements that were previously expected

Pros and Cons of Github docs vs pdoc

Github over pdoc

• More friendly for beginner devs?
• Saves a click, may be better for retention or to show what is possible
  • Could add a gif that shows the wide variety of problems that can be created
    • Quickly shuffle through frames showing a randomly generated problem
• May be more difficult to generate sample problems for pdoc

Pdoc over github

• Better layout, easier to nest subjects
• Better documentation and explanation for each function
• Don't have to wait for all of the mathjax to render in gh readme
  • could just make multiple subject readmes, but I think i would prefer pdoc over nabigating many gh readmes

Todo

• Add underscores to non-generator methods that should not be included in documentation
  • Do the same for private modules (buildlatex.py, etc)
• Create getGenList method doing exactly the same thing as before
• Delete old readme generator table
  • Add example problems to documentation
• Use snake case instead of camelCase or PascalCase for variables and functions #406

Todo later

• Create gif showcasing generators