Some 'fundamental' changes. Modified output to overwrite the current line if nothing changed, added date to output format, typo fix, added some todo lists, changed how sites are specified (optionally; the old method still works).
One more 'idea'.
Merge pull request #1 from gburtini/master

Pull me please! Some improvements to sitewatcher (from my perspective).

-->Yeah, I am cool with these changes.  Merging in.