util updates

30% quicker vector_generate
documentation comments
FrameInfo node
Datalevel fix
Level 0 fix
Panel in tools

Correct context poll, using provided context to access obj
Listslice level 0

Now working with level 0 works properly
Bisect tool

based on the bmesh function. can keep what is behind or in front of cut
also.
-print
Merge pull request #45 from ly29/master

updates