fixed a bug in optimize restarts: it now used optimizer_array
[inference] less constant jitter, and jitter adjustements

Conflicts:
	GPy/util/linalg.py
Changes to datasets.py
Merge branch 'devel' of https://github.com/SheffieldML/GPy into devel
Added forced extraction of eggs (as we have a fair few non-py files and use the directory structure) added some files to MANIFEST and setup.py's package_data so its included upon distributing
Merge branch 'devel' of https://github.com/SheffieldML/GPy into devel
merged in latest devel with bugfix in setup.py