Combine find_circle, find_triangle, and find_cross into one mission find_shape

[fnivek]

These files are copies of each other which is horrible programming practices. All three find_ missions should be put into a single find_shape mission.

[zachgoins]

Was planning on doing this soon, just hadn't gotten to it yet. On it.

On Sat, Jun 27, 2015 at 11:29 AM, fnivek notifications@github.com wrote:

These files are copies of each other which is horrible programming
practices. All three find_ missions should be put into a single find_shape
mission.

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#37.