Log message

Add property ClientScriptManagerClass to TPageService and releated changes in
TPage.getClientScript() to allow subclassing of TClientScriptManager

	Modify	/branches/3.1/HISTORY	diff
	Modify	/branches/3.1/framework/Exceptions/messages/messages.txt	diff
	Modify	/branches/3.1/framework/Web/Services/TPageService.php	diff
	Modify	/branches/3.1/framework/Web/UI/TPage.php	diff