v0.2.1

What's Changed

• Added solution_output option to solveROCS which saves output to file
• Added cond which can compute condition numbers faster if $A^{-1}$ is known
• Fixed sparsity which was returning the density of a matrix, not its sparsity
• Fixed some utility functions not being imported when they should be

Full Changelog: v0.2.0...v0.2.1