[cleanup] improve various fields in addon.xml

[un1versal]

We are trying to cleanup the addon.xml and sove the various reports on forum that in isengard, you cannot install WIMM anymore via zip due to "addon does not have correct structure" errors.

These chnages are needed anyway though they not solve the issue, they still a needed cleanup.

@fyfe ideas?

[un1versal]

@fyfe this can be committed now and no users would be affected by this. However the a proper repo needs to be done which I already satrted working on and should be ok for these releases see #133

Im gonna see if I can push a branch for repo only.

[un1versal]

@fyfe please review this PR should merge this asap. though I would prefer to use some better url replacement than tinyurl, but just wanted to remove the "?" from forum url

[ghost]

The only thing that needs changed is the web interface extension the rest doesn't need changed.

[un1versal]

@fyfe 2 things.

1. addon name needs changing asap to what I specified here or better (there's a very good reason for that)
2. Kodi has begun a fast release cycle, and Isengard beta1 will be around the end of next month. The version commit already in master.

You will have to deal with it sooner rather than later.