pos-at-time stuff: refactored code to simplify changes
experimented with 'pos=<fraction>' stuff to allow "search for x/y values"
improved manual indices
updated docs+todo
fixed bug in manual
updated todo
updated todo
fixed bug: xelatex failed to run contour external
Added regression test
updated readme
updated todo
added regression test for name path
improved tests for up to date check of external lib