Merge pull request #2 from CircuitBirds-FRC4601/Homepage-collapse

Modal for login. Collapse for "posts" makes things look clean and compac...
Login error handling and a few small js things.
Grammer and other small details
Fixed javascript in signup, switched to an ajax POST request instead of GET on a single thread, added pretty secure client side password hashing. The PHP for this is giving an error on the post variables. Also created new, blank sponsors index, ready to be worked on :)
Merge pull request #3 from CircuitBirds-FRC4601/master

Merging the new signup page with improved js