added LU signature
Merge remote-tracking branch 'upstream/master' into develop
Merge remote-tracking branch 'upstream/master' into develop
Merge remote-tracking branch 'upstream/master' into develop
Merge remote-tracking branch 'upstream/master' into develop
Merge remote-tracking branch 'upstream/master' into develop
Some gnumber additions/comments; LU pseudocode (likely buggy)
Merge pull request #7 from bbarker/master

LU pseudocode and gnumber comments & additions.