Handle src url errors

[opus1269]

The element doesn't let you know when a url is bad. It also does not handle re-setting the src after it was set to a bad url correctly. I have submitting a pull request to address this.
#35

[Negashev]

+1

[kevin-wise]

Seems like this is a duplicate of #33

[opus1269]

Yes. I'm not concerned about the implementation details, as long as there is a property indicating the load failed and you can set the src after querying that.

[jonnenauha]

#33 was closed due to the fallback src. I kind of agree it gets a bit too complicated with it. This #35 looks simple and fixes real issues. The error bool will allow people to implement their own fallback mechanism (also, as setting src again is now supported without hacks ;)

[bicknellr]

Release 1.1.0 now includes error property support.