Added TACGRP.TSK.CNT / CONTAIN Graphic (G*T*J-----****X) #16
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Added TACGRP.TSK.CNT / CONTAIN Graphic (GTJ-----****X).
Also added quick geometry function to test if a set of points are clockwise.
I am opening a pull request to your fork (rather than the main repo) as I plan to create boundary/line based contributions in the future. This is just me getting my feet wet in this project.
Screen shot of added graphic (example data included in /example-data/tacticaljson/contain.json):
