Setup native build for Windows Java.

Still need to do Mac & Linux

java/CMakeLists.txt

@@ -0,0 +1,74 @@
+cmake_minimum_required(VERSION 3.2)
+
+project(ZeroTierOneJNI)
+
+find_package(Java COMPONENTS Development)
+message("JAVA_HOME: $ENV{JAVA_HOME}")
+
+set(Java_INCLUDE_DIRS $ENV{JAVA_HOME}/include)
+
+message("Java Include Dirs: ${Java_INCLUDE_DIRS}")
+
+if(WIN32)
+    add_definitions(-DNOMINMAX)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHsc /W3 /MP")
+endif()
+
+set(src_files
+    ../ext/lz4/lz4.c
+    ../ext/json-parser/json.c
+    ../ext/http-parser/http_parser.c
+    ../node/C25519.cpp
+    ../node/CertificateOfMembership.cpp
+    ../node/Defaults.cpp
+    ../node/Dictionary.cpp
+    ../node/Identity.cpp
+    ../node/IncomingPacket.cpp
+    ../node/InetAddress.cpp
+    ../node/Multicaster.cpp
+    ../node/Network.cpp
+    ../node/NetworkConfig.cpp
+    ../node/Node.cpp
+    ../node/OutboundMulticast.cpp
+    ../node/Packet.cpp
+    ../node/Peer.cpp
+    ../node/Poly1305.cpp
+    ../node/Salsa20.cpp
+    ../node/SelfAwareness.cpp
+    ../node/SHA512.cpp
+    ../node/Switch.cpp
+    ../node/Topology.cpp
+    ../node/Utils.cpp
+    ../osdep/Http.cpp
+    ../osdep/OSUtils.cpp
+    jni/com_zerotierone_sdk_Node.cpp
+    jni/ZT1_jniutils.cpp
+    )
+
+set(include_dirs
+    ${CMAKE_CURRENT_SOURCE_DIR}/../include/
+    ${Java_INCLUDE_DIRS})
+
+if(WIN32)
+    set(include_dirs
+        ${include_dirs}
+        ${Java_INCLUDE_DIRS}/win32)
+endif()
+
+include_directories(
+    ${include_dirs}
+    )
+
+add_library(${PROJECT_NAME} SHARED ${src_files})
+
+set(link_libs )
+
+if(WIN32)
+    set(link_libs
+        wsock32
+        ws2_32
+
+        )
+endif()
+
+target_link_libraries(${PROJECT_NAME} ${link_libs})