added documentation for the README file and the grading_help file
added note indicating client code was borrowed from eebae server code'
removed all exrta sound files
drew the title for the game and updated instructions to include speed
adding visualizations from cindy's code and code to display
speed indicators

Merge branch 'cindy' into bill
cleaned code of comments/test code and fixed title alignment
added some more validation to prevent empty circles and prevetning empty fields from being entered
removed deletion code from the API, updated documents accordingly, added user studies document, changed tracks to allow overlapping lines and to allow for line.begin to be < line.end
added buttons and style
Merge branch 'bill' of https://github.com/cindyxu/StarRunner into bill
writing instructions