Merge pull request #62 from metaplinius/master

Built a cross product option into vector_math.
Merge pull request #63 from metaplinius/master

Vector debug node
mn_node_utils
for loop
fix
loop header
fix
loop objects code line
first working version (needs cleanup)
fix
cleanup
fix
fix
cleanup
Revert "cleanup"

This reverts commit b542e3ef1845763643e442d7f54017239d573ada.
Revert "Revert "cleanup""

This reverts commit 5fcf7800b87600dae691e42a333a8eae5d444ab4.
try if iterable
recognize empty sockets as other type
from single socket works again
cleanup