reorganize repository

see first item of async/paraview#119

This MR removes the following directories and updates where necessary the CMakeLists.txt

Adaptors
Clients/Catalyst
Clients/InSitu
Clients/PythonCatalyst
Clients/Web
Documentation
Examples
Plugins
Remoting/Animation
Remoting/ClientServerStream
Remoting/Core
Remoting/Export
Remoting/Live
Remoting/Misc
Remoting/ServerManagerPython
Remoting/ViewsPython
Utilities/ColorSeriesToXML
Utilities/Doxygen
Utilities/LegacyColorMapXMLToJSON
Utilities/Maintenance
Utilities/Sphinx
Utilities/WrapClientServer
Utilities/spack
Web
Wrapping