Libraries and Ext.ux

Ext.ux.upload was originally created by Harald Hanek (github.com:harrydeluxe) and is available from

https://github.com/harrydeluxe/extjs-ux.git

For ExtJS 4.2.1 support the fork by Nikolai Babinskyi (github.com:babinik) was used

https://github.com/nbabinski/extjs-ux.git
9837ab6 [nbabinski/master] form status bar - use itemId instead of id cfg option

resources/lib/plupload is also from this repo