removed @deprecated for IKonsExtension which is back in normal use.

commented the deprecation and added a short explanation.

Removed since the deprecation got deprecated...
Elexis 3.0.0 regularly uses IKonsExtension.

Gerry actually wanted to have Kons as plugin - but this is no more in Elexis.
May be this could still be a good idea in general - eg. if some other people than physicians wanted to use Elexis they'd probably need some other type of "Kons"

Gruss, Harry