add a graphmanager2d interface
add a graphmanager2d interface

this isn't quite done yet, it needs to have the output to canvas method
added to it, but has most of the input stuff from the buttons complete

Signed-off-by: Sam Phippen <e5a09176608998a68778e11d5021c871e8fae93c@googlemail.com>

samphippen/spe,samphippen/spe,samphippen/spe,samphippen/spe