Merge pull request #37 from thomas-vincent/fix-physio

Fix perfusion baseline simulation
Merge pull request #38 from thomas-vincent/fix-physio

Fix cartesian evaluation (cartesian_apply, tree_to_xndarray)
Add html output for xndarray (WIP). TODO: test on more complex arrays
move indev code for xndarray html output to lib
Cleaning: remove some useless prints & args
Fix prf & brf length
Merge branch 'xndarray_html_ouput' into fix-physio