Fix when WITH_TUTORIALS is disabled
[cmake] Set the install destination
[python-binding] Add link to libtinfo
* Use set CACHE PATH to set LLVM_CONFIG instead of if-cond
* Remove unused CLANG_PATH from CMakeLists.txt
* Do not build apps and tutorials only when the OS is Windows
* Update README.md
* Fix bilateral_grid app
* Remove unused LLVM_BIN from scr/CMakeLists.txt