Added option for enabling or disabling building an app bundle on OS X,
and added variables for fine tuning the install destinations.
Added the MACOSX_BUNDLE property on main executable to create the app bundle, and provided necessary bundle information.
Added icon file from marcxs's app bundle

Not sure if this is good place to put it
Changed install destinations to use variables
Added install commands for smesh, and changed build output to lib
Use BundleUtilities to bring in all dependent libs
Same install destinatin change to new Spreadsheet workbench
Fix mistake in install destinatin path
Add more search paths and libraries for BundleUtilities
MATCHES regex was wrong
add PyQt4 to the list of libs
GLOB_RECURSE was finding unwanted libraries
Replace hard coded python version with variable
Can't depend on OCC_LIBRARY being defind
Handle both framework install and unix install of python
Created a qt.conf file to specify where the Qt plugins are.
fix typo
fix some paths
Keep CMAKE_INSTALL_PREFIX a variable in the configured file

This is needed for it to work with CPack, since the install prefix will be different
Quick hack for CPack DragNDrop dmg