3.1
A few incompatable changes (variables, options):
- Rename pre-defind variables: INNAME, INBASE, HTML -> SRC_FILE, SRC_BASE, HTML.
- If variable namestarts with _, do not put it in the index.
- Rename option --init_width -> --page_width, use it in init mode as before and also for html max-width setting.
- Optional find_root feature: find root folder, use it in \inc, html filter, set HTML_ROOT and HTML_DIR variables.
- Improve functions for finding relative paths.
- Add --ph_resize option: set path to ph_resize program (useful if it's not installed in the system).