Merge pull request #575 from Cadair/0.3

bump version numbers
Pass draw_limb kwargs to patch.Circle
Pass draw_grid kwargs to plot
Updated example code in README.md. This fixes issue #570.
Fixed links in plotting guide. This fixes issue #576.
Merge pull request #591 from derdon/issue576-0.3

Fixed links in plotting guide. This fixes issue #576.
Merge pull request #590 from derdon/issue570-0.3

Updated example code in README.md. This fixes issue #570.
Merge pull request #589 from Cadair/0.3_draw

Patch the draw_grid and draw_limb methods of map to allow keyword arguments