[TYPO3-core] FYI: #13327: Update ExtJS to version 3.1

[Steffen Kamper]

Hi,

FYI: updated ExtCore to version 3.1. Added jsb-files.

Committed in svn trunk rev 6812

Q: What are jsb files for?
A: These files are for code completition. many IDEs support this, like 
Aptana or Eclipse.

vg Steffen