Alpha release (still work to do, mainly in analyse.ph)

On branch master, changes to be committed:
	modified:   .gitignore
	modified:   README.rst
	modified:   doc/conf.py
	modified:   multinest_bridge/Makefile
	modified:   multinest_bridge/cnest.c
	modified:   pyapemost/__init__.py
	modified:   pyapemost/analyse.py
	modified:   pyapemost/run.py
	modified:   pyapemost/watch.py
	modified:   pyapemost_demo.py
	modified:   pycuba/__init__.py
	renamed:    pymultinest/__init__.py -> pymultinest3/__init__.py
	renamed:    pymultinest/analyse.py -> pymultinest3/analyse.py
	renamed:    pymultinest/plot.py -> pymultinest3/plot.py
	renamed:    pymultinest/run.py -> pymultinest3/run.py
	renamed:    pymultinest/watch.py -> pymultinest3/watch.py
	renamed:    pymultinest_demo.py -> pymultinest3_demo.py
	modified:   setup.py