Team page refactor: make data driven, remove not used css classes.

[cherchezlafemme]

This PR:

• updates template for team page to use variables from controller to avoid duplicate markup and make code more readable;
• fixes the bug with tooltip rendering (it was not centered when resized + weird behavior for the last person in a row); this PR makes tooltip render correctly on all screen sizes;
• removed not used image for google groups;
• delete empty guides.js.coffee file;
• cleans up team page css + template to remove not used classes;
• mover testimonials related images into dedicated folder for better project organization;
• adds Pamela, Christina and Porsha to the team page.

[cherchezlafemme]

@jadefaerie this PR is mostly refactor to make code more readable and to remove not used files from project. It also fixes the bug with the rendering of the tooltip content for the team page on hover. I would love to merge this in before we deploy to production. Let me know if you have any questions!