some small updates.
Merge branch 'master' of github.com:ekeberg/Python-tools
Merge branch 'master' of github.com:ekeberg/Python-tools
Merge branch 'master' of github.com:ekeberg/Python-tools

Conflicts:
	Scripts/plot_image_3d.py
Merge branch 'master' of github.com:ekeberg/Python-tools

Conflicts:
	Modules/tools.py
	Scripts/make_all_python_executable.py
Fixed but in tools.log_range
Merge branch 'master' of github.com:ekeberg/Python-tools
Several changes to rotations.py concerning axis order.
Merge branch 'master' of github.com:ekeberg/Python-tools
Merge branch 'master' of github.com:ekeberg/Python-tools
Merge branch 'master' of github.com:ekeberg/Python-tools
Small changes, some modules now load numpy instead of pylab
Added function ellipsoidal_mask.
Small changes.
Merge branch 'master' of github.com:ekeberg/Python-tools

Conflicts:
	Modules/rotations.py