FIX you can't assign NULL and then try to delete it later
build UNIFORM tree 5th argument of new
just git...
update comments for the structs
we need p4est in the world
upate all function comments

such that they are doxygen usable
realign nicely
add a pointer to p4est structure into world

we occasionally need to interact with p4est ;)
dummy for finding owner rank of given quadrant
ADD particle to p4est translation
supplement two cases to particle insert dummy