Implement simple stance grouper
Implement simple stance grouper

Motivation:
-to investigate points by stance

Change Explanation:
-group points by stance attr and then select the most common points that
are uniq to that group.

charlieegan3/points-extraction,charlieegan3/points-extraction,charlieegan3/standpoint,charlieegan3/standpoint,charlieegan3/standpoint,charlieegan3/points-extraction,charlieegan3/points-extraction,charlieegan3/points-extraction,charlieegan3/standpoint,charlieegan3/points-extraction,charlieegan3/standpoint