Removed non-functioning ODE_UY.py, needs to be tested before inclusion'
Merge branch 'devel' of https://github.com/SheffieldML/GPy into devel

Conflicts:
	GPy/kern/parts/ODE_UY.py
Merge branch 'devel' of https://github.com/SheffieldML/GPy into devel
Small changes to sympy kern.