Add scrollDecoratorChanged signals

The signals are not used by UI, but required in order to avoid
"depends on non-NOTIFYable properties:" warnings.
Merge pull request #58 from rojkov/scroll-decorator-signals

Add scrollDecoratorChanged signals
[qtmozembed] Don't change location when load starts

OnLocationChanged is called when url is resolved. E.g. when
url is resolved to download link, location won't change but load starts.
Merge pull request #59 from rainemak/urlChangeFix

[qtmozembed] Don't change location when load starts
[qtmozembed] Don't change location when load starts. Merge remote-tracking branch 'origin/master'