Update github.io page with developer documentation

[cammoore]

Please do work for this task in a branch named issue-001.

Edit the index.md file in bowfolios.github.io to document this system:

• Explain the join collections and the data model.
• Provide a walkthrough of the pages in the site.
• Explain the use of meteor methods. (Provide link in Methods.js file)
• Make the application a template so that students can easily hack it.
• Use of indexes to guarantee uniqueness of fields used as keys.

Possible extensions:

• DIsplay home page for project as an icon.
• Add ability to edit and delete Projects.
• Add an "owner" field to restrict editing access to projects you've created.
• Add ability to add, edit, and delete Interests.
• Show better error message when trying to define a duplicate Project.
• Provide admin-only capabilities (delete user?)
• Implement testing
• Implement documentation.js