Local install should uset the CMAKE_INSTALL_PREFIX to set variables

[abdes]

The ASAP_xxx variables should be set using the install prefix:

    # Install into local directory
    set(ASAP_INSTALL_ROOT      "${CMAKE_INSTALL_PREFIX}")                     # ./
    set(ASAP_INSTALL_LIB       "${ASAP_INSTALL_ROOT}/lib")                    # ./lib
    set(ASAP_INSTALL_SHARED    "${ASAP_INSTALL_LIB}")                         # ./lib
    set(ASAP_INSTALL_CMAKE     "${ASAP_INSTALL_ROOT}/share/cmake/${META_PROJECT_NAME}") # ./share/cmake/<project>
    set(ASAP_INSTALL_PKGCONFIG "${ASAP_INSTALL_ROOT}/share/pkgconfig")        # ./share/pkgconfig
    set(ASAP_INSTALL_EXAMPLES  "${ASAP_INSTALL_ROOT}")                        # ./
    set(ASAP_INSTALL_DATA      "${ASAP_INSTALL_ROOT}")                        # ./data
    set(ASAP_INSTALL_BIN       "${ASAP_INSTALL_ROOT}/bin")                    # ./bin
    set(ASAP_INSTALL_INCLUDE   "${ASAP_INSTALL_ROOT}/include")                # ./include
    set(ASAP_INSTALL_DOC       "${ASAP_INSTALL_ROOT}/doc")                    # ./doc
    set(ASAP_INSTALL_SHORTCUTS "${ASAP_INSTALL_ROOT}/misc")                   # ./misc
    set(ASAP_INSTALL_ICONS     "${ASAP_INSTALL_ROOT}/misc")                   # ./misc
    set(ASAP_INSTALL_INIT      "${ASAP_INSTALL_ROOT}/misc")                   # ./misc