RBF with uniform grid not working

[pvrancx]

Creating an RBF representation with the grid_bins argument doesn't work. RBF.init calls uniformRBF to initialize the grid, but uniformRBF needs self.domain to be set. self.domain is still None at the time of this call and isn't initialized until the call to super(RBF).init(...) at the end of the init method.

[[e-mail]]

fixes #46, thanks pvrancx for reporting!

→ <<cset b91b1539d874>>