[PDFNet] Hiding the page number in PDFViewCtrl

Removing the page page indicator can be accomplished by modifying the tools library. The source code for the tools library is found in /Lib/src/PDFViewCtrlTools/Tools, and for this particular modification in the source file /Lib/src/PDFViewCtrlTools/tools/Tool.m. On line ~68 in the method initWithPDFViewCtrl, you can comment out the line that adds m_pageNumberLabel as a subview. If you compile the PDFViewCtrlTools project with this modification and use the new libTools.a with the complete reader sample, the page number indicator will be gone.