Work in progress show top running methods
Fix Analyzer._getCountedRunningMethods()

Before this change it did a toString() before returning that it
shouldn't.
Give the StringCounter a toHtml() method

... and use it to create both the Ignored and the Top Running tables.
Cosmetic web page changes

The most visible one is that the Top Running Methods section isn't red
any more.
README: Top Running Methods section done
README: Add various TODO items
Merge pull request #4 from spotify/top-running

Add Top Running Methods to analysis