[#62009744] Created a new "Manage your group store" section. Created an index for the new section. Created a page explaining how to cancel an order for your group members.

Index Page:
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![fullscreen_1_20_14__10_13_am](https://f.cloud.github.com/assets/2251119/1955794/c03389c4-81ed-11e3-9c2a-21f57eb70b7c.jpg)

Cancel an Order Page:
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![fullscreen_1_20_14__10_13_am](https://f.cloud.github.com/assets/2251119/1955798/d2418666-81ed-11e3-98bf-ff7c95f8baa9.jpg)
![fullscreen_1_20_14__10_13_am](https://f.cloud.github.com/assets/2251119/1955801/db9d9ec0-81ed-11e3-9e4d-84e857506cb4.jpg)