Minor changes
Merge branch 'devel' of https://github.com/SheffieldML/GPy into devel

Conflicts:
	GPy/examples/dimensionality_reduction.py
much tidy9ing in sparse_GP
weaved linear kern
tried to eliminate the regexp overflow error for large models
Broken file fixed
Some changes according to  the changes in sparse_GP
reverted EP procedure (removed cholupdate)
removed unnecessary computaiotn of P in sparse GP
merging
new termination rule for scg
Merge branch 'devel' into mrd
added logexp_clipped transformation
SCG convergence tolerance increased, will now converge more easily
conjugate gradient optimizer without callback (no c.join)
BGPLVM MRD Examples and plotting adjustments
Scale Factor removed and moved V=Y*beta into likelihoods