Factored all css sheets in standard styles.css file.

amd/build/vplide.min.js

amd/src/vplide.js

css/checkjailservers.css

css/grade.css

css/index.css

css/sh.css

css/similarity.css

editor/editor_utility.php

forms/gradesubmission.php

index.php

jscript/updatesublist.js

similarity/diff.php

similarity/listsimilarity.php

similarity/similarity_base.class.php

similarity/user_similarity.php

styles.css

version.php

view.php

views/checkjailservers.php

views/previoussubmissionslist.php