updated composer

included the most recent version of composer
fix dependency

phpmd dev-master requires pdepend dev-master and not 1.1.1
gave some content to style.css

to avoid file not found warning, I added some content to style.css
updated path to jquery

the path to jquery wasn't correct, which resulted in default page not
showing any content.
Merge pull request #1 from winkbrace/master

This pull request includes 4 fixes that were throwing warnings and errors