Added ninja and proper boost find

appveyor.yml

@@ -48,6 +48,8 @@ install:
   - cd %BOOST_ROOT%
   - bjam cxxstd=14 release --with-system --layout=system address-model=64 link=shared stage
 
+  - choco install ninja
+
   - cd %APPVEYOR_BUILD_FOLDER%\bindings\lib\libtorrent
   - mkdir build && cd build
   - cmake -DBOOST_LIBRARYDIR=%BOOST_ROOT%\stage\lib -DCMAKE_CXX_STANDARD=14 -Dbuild_tools=ON -G "Visual Studio 15 2017" -A x64 ..

bindings/CMakeLists.txt

@@ -53,8 +53,11 @@ find_library(LIBTORRENT_LIB torrent-rasterbar)
 target_include_directories(${PROJECT_NAME} PRIVATE ${LIBTORRENT_INCLUDE_PATH})
 target_link_libraries(${PROJECT_NAME} ${LIBTORRENT_LIB})
 
-find_path(BOOST_INCLUDE_PATH boost)
-target_include_directories(${PROJECT_NAME} PRIVATE ${BOOST_INCLUDE_PATH})
+
+find_package(Boost)
+if(Boost_FOUND)
+  target_include_directories(${PROJECT_NAME} PRIVATE ${Boost_INCLUDE_DIRS})
+endif()
 
 # Include N-API wrappers
 execute_process(COMMAND node -p "require('node-addon-api').include"