Revert "added demo project"

This reverts commit 01b5fd6a01f4c2222cc0bd458e35d53d9d1c4388.
Revert "Revert "added demo project""

This reverts commit b4aecb5b29ea2ae7699587e25786e25ecca6dac1.
Revert "Revert "Revert "added demo project"""

This reverts commit 12cd7f029407d1026d2ab984bb0813705d0c4779.
Revert "Revert "Revert "Revert "added demo project""""

This reverts commit 76bb250321805da6e1e8ed862501d849bf1db576.