added a utility method for lens.
fix to OptionIndex
Add figure width and height accessors
Merge pull request #10 from alno/figure_dimensions

Add figure width and height accessors
Fix typo
Merge pull request #11 from alno/figure_dimensions_typo_fix

Fix typo in figure dimensions
Layer of indirection to make matrix multiplication work on old systems.
Merge branch 'master' of github.com:dlwh/breeze