importing a module ( file ) from the same directory is only possible with the relative import syntax however, I prefer the more consistent "from OCC.Display import X" syntax

fixes #25

importing a module ( file ) from the same directory is only possible with the relative import syntax
however, I prefer the more consistent "from OCC.Display import X" syntax

finally, `apply` is no longer a keyword in py3k, so that's updated to unpacking the arguments form a tuple