no longer has rainbovis as a dependency, added more tests
removed jquery from quality chart dependency list
dot plots only zoom when scrolling inside graph area not when over svg
added default font-size for svg elements to style sheet
removed old quality chart
Merge pull request #11 from DavidBryson/devel

Removed rainbovis as a dependency, changed demo, changed css, removed old quaility chart code.
Merge branch 'devel' of github.com:wtsi-npg/bcviz into devel