switching to CPython parser
windows path issue
remove AST contructors without start and end locations
normalize the missing start/end locations of nodes, so as to eliminate things appearing at random places in HTML
refactor and add IDEA project files
lots of clean up
clean up logic of the messy called/uncalled stuff
renamings and cleanups
further simplifications
exclude tests dir from IntelliJ
delete useless comments
half way through fixing Issue #11
inferred nullness annotations
got out of the throws-Exception-everywhere insanity
module system gradually back into shape and better ever than before
clean up URL mess
suppress warning for string index out of bound which happens during rare cases (with weird encoding in files)
cleanups
remove system-dependent path manipulations
use PYTHONPATH env variable. remove stdlib argument from HtmlDemo