ENH: Renamed zlib, png, jpeg, tiff, and expat directories in the Utilities directory to vtkzlib, vtkpng, vtkjpeg, vtktiff, and vtkexpat respectively.  Adjusted the include structure so that code includes vtk_zlib.h and automatically gets the version of zlib used by VTK (and similarly for the other libraries).  Along with the recent name mangling changes, this now completely isolates VTK's version of these libraries and avoids conflict with system versions or versions in other toolkits.

interesected the region on it's boundary.

1) In the File menu, move Save Batch Script to after Save Session Trace and 2) Make the first column in the Filter menu actually have 25 entries

ENH: Added vtk_expat.h to ensure that VTK finds the correct expat.h when not using system expat.  Added vtk_expat_mangle.h to mangle all the public symbols in the vtkexpat library to start with a vtk_expat_ prefix.  This will avoid conflicts with applications that link to vtkIO and a separate expat library.

ENH: Added vtk_tiff.h to ensure that VTK finds the correct tiffio.h when not using system tiff.  Added vtk_tiff_mangle.h to mangle all the public symbols in the vtktiff library to start with a vtk_TIFF prefix.  This will avoid conflicts with applications that link to vtkIO and a separate tiff library.

ENH: Added vtk_jpeg.h to ensure that VTK finds the correct jpeglib.h when not using system jpeg.  Added vtk_jpeg_mangle.h to mangle all the public symbols in the vtkjpeg library to start with a vtk_jpeg_ prefix.  This will avoid conflicts with applications that link to vtkIO and a separate jpeg library.

allows for a few extra unaccounted for chars.

1. Added accessor to colormaps 2. Changed filter menu creation so that all filters always show up, the ones that are not valid are disabled