wicket-minis IE and Safari

[Sven Meier]

Hi all,

I've pushed two behaviors to wicketstuff-minis, which I've used in 
several projects to take care of common problems with two of our 
'beloved' browsers:

https://github.com/wicketstuff/core/blob/master/minis-parent/minis/src/main/java/org/wicketstuff/minis/behavior/ie/DocumentCompatibilityBehavior.java

https://github.com/wicketstuff/core/blob/master/minis-parent/minis/src/main/java/org/wicketstuff/minis/behavior/safari/PersistedCacheBehavior.java

Description is in the JavaDoc.

Let me know if I've duplicated functionality we already have somewhere 
else or if you have any other feedback.

Thanks
Sven