Refactor controls js generation

[rzblue]

• Only regenerate output when input changes. This fixes issues with autobuilders that trigger rebuilds on filesystem events
• Use logging api instead of print. This makes the extension obey sphinx's verbosity settings
• Use pathlib
• use snake_case

[katzuv]

Suggested change

	with OUTPUT_FILE.open("w") as outf:
	for source_file in source_files:
	with source_file.open("r") as source:
	if not debugJS:
	# Minify each file independently - again, low bar solution for now
	minified = jsmin(source.read())
	outf.write(minified)
	outf.write("\n")
	else:
	# Verbose, no minify, and add debug markers.
	outf.write("\n\n\n")
	outf.write(
	"//*******************************************************\n"
	)
	outf.write(
	"//*******************************************************\n"
	)
	outf.write("//** {}\n".format(source_file))
	outf.write(
	"//*******************************************************\n"
	)
	outf.write(
	"//*******************************************************\n"
	)
	outf.write("\n")
	outf.write(source.read())
	outf.write("\n")
	output_text = ""
	for source_file in source_files:
	text = ""
	if not debugJS:
	# Minify each file independently - again, low bar solution for now
	minified = jsmin(source_file.read_text())
	text += minified + "\n"
	continue
	# Verbose, no minify, and add debug markers.
	text = f"""\n\n\n
	//*******************************************************
	//*******************************************************
	//** {source_file}
	//*******************************************************
	//*******************************************************
	{source_file.read_text()}
	"""
	output_text += textwrap.dedent(indented_string)
	OUTPUT_FILE.write_text(output_text)

Further testing with dedent is needed, but I think it's more concise.