Implemented Mapping framework and associated linear and kernel mappings. This is needed for mean functions, back constrained GPLVM and the non-stationary Gibbs kernel.

GPy/models/__init__.py

@@ -8,6 +8,7 @@ from svigp_regression import SVIGPRegression
 from sparse_gp_classification import SparseGPClassification
 from fitc_classification import FITCClassification
 from gplvm import GPLVM
+from bcgplvm import BCGPLVM
 from sparse_gplvm import SparseGPLVM
 from warped_gp import WarpedGP
 from bayesian_gplvm import BayesianGPLVM