v1.0.6

Small change here to the polar_angle function, allowing user to set the direction that angle increases (clockwise or counter-clockwise)

What's Changed

• Adds conda install instructions by @billbrod in #36
• Allows user to specify polar_angle direction by @billbrod in #37
• updates version tags by @billbrod in #38

Full Changelog: v1.0.5...v1.0.6