Added Past/Existing Members section

Added some css, added the link to the contact info form
Added past members documents

Added past members documents and added the template for "Joining the
Team" info page
Adding All Members general information area
Updating front page

Added reference documentation link, updated the jumbotron with a new
STEM mission statement, and spruced up the information sections
Updated SAE Logo

Updated to new SAE NW Logo
Merge pull request #4 from FRC-1294/develop

Adding general information section to front page