Initial changes to the HTML coverage bars

File is better structured and duplicate code got removed,
Next step: show which files were added and which were deleted in the
overview
More changes concerning deleted and new packages/classes

Instead of showing +100% or -100%, it will now say New or Deleted

Deleted packages and classes and now shaded
Again, alot of changes to both the output and the structure of the code

Code was simplified and a lot of branches were removed

Output now also shows the change in the amount of conditions for a
package and a class
Small style fixes
Merge pull request #56 from soosterwaal/html_improvements

Html improvements