Merged lowpro.jquery.js inside prado.js and removed the unneeded bits
Fixed TImageButton, TActiveImageButton
Fixed TActiveCheckbox's validation
Fixed TActiveRadioButton's validation
Ported TActiveTextBox
Fixed TActiveCustomValidator
Log ajax exceptions a bit better

Its still sucks because of the support to logger.js.. i suppose
everybody uses a browser's console nowadays, so we'd better drop this
away..
Ported TActiveFileUpload
Fixed TActivePager's demo
Fixed evaluation of end-scripts on callback

Aka: fix js event creation on callbacks
Ported TCallback + demo