Merge pull request #2 from rdebroiz/0000-visage_superproject

Allowing private-plugins superproject
Change RPI repository location
set CPACK_INSTALL_CMAKE_PROJECTS in Packaging.cmake
DEB package available
RPM package avilable
fix name of prerm script
rm cmake/Packaging.cmake
add README.txt
move Packaging.cmake
comment rpm dependance
fix postinst scrip (workes now with bash, sh, etc.)
remove windows stuff from packaging
remove some useless stuff