Add load_kernels method to TourConfig, Trajectory and MetaKernel objects

Implement load_kernels methods into TourConfig, Trajectory and MetaKernel objects:

>>> tour = TourConfig(mk='metakernel.tm', load_kernels=True)
# or
>>> tour.load_kernels()

>>> traj = tour[...]
>>> traj.load_kernels()

>>> mk = MetaKernel('metakernel.tm', load_kernels=True)
# or
>>> mk.load_kernels()

See docs.

---

Closes #62 (closed)

changed milestone to %Version 1.0

enabled an automatic merge when the pipeline for 5eb8dddc succeeds

merged

mentioned in commit c1357480

mentioned in commit a520b710

Add load_kernels() to MetaKernel in a520b710.

changed title from Add load_kernels method to TourConfig and Trajectory objects to Add load_kernels method to TourConfig, Trajectory and MetaKernel objects

changed the description