SCons will now build IAccessible2 and acrobatAccess typelibs itself from their respec...

SCons will now build IAccessible2 and acrobatAccess typelibs itself from their respective idl files, thus its no longer necessary to download ia2.tlb or acrobatAccess.tlb from nvda-project.org. SCons will now also build iaccessible2proxy.dll (for both 32 and 64 bit) from the idl file, thus it is no longer necesary to download these proxy dlls from nvda-project.org.