Added DCMTK port (microsoft#3491)

* added dcmtk port

* [dcmtk] Cleanup and use vcpkg_from_github()

ports/dcmtk/CONTROL

@@ -0,0 +1,3 @@
+Source: dcmtk
+Version: 3.6.3
+Description: This DICOM ToolKit (DCMTK) package consists of source code, documentation and installation instructions for a set of software libraries and applications implementing part of the DICOM/MEDICOM Standard.

ports/dcmtk/dcmtk.patch

@@ -0,0 +1,15 @@
+diff --git "a/CMake/dcmtkPrepare.cmake" "b/CMake/dcmtkPrepare.cmake"
+--- a/CMake/dcmtkPrepare.cmake	2018-02-05 12:58:13.000000000 -0500
++++ b/CMake/dcmtkPrepare.cmake	2018-04-25 15:07:12.927851000 -0400
+@@ -192,9 +192,9 @@
+ # CMake's files (DCMTKTarget.cmake, DCMTKConfigVersion.cmake and DCMTKConfig.cmake) are installed
+ # to different installation paths under Unix- and Windows-based systems
+ IF(UNIX)
+-  SET(DCMTK_INSTALL_CMKDIR "${CMAKE_INSTALL_LIBDIR}/cmake/dcmtk")
++  SET(DCMTK_INSTALL_CMKDIR "share/dcmtk")
+ ELSEIF(WIN32)
+-  SET(DCMTK_INSTALL_CMKDIR "cmake")
++  SET(DCMTK_INSTALL_CMKDIR "share/dcmtk")
+ ENDIF(UNIX)
+
+ #-----------------------------------------------------------------------------

ports/dcmtk/portfile.cmake

@@ -0,0 +1,49 @@
+include(vcpkg_common_functions)
+
+if(VCPKG_LIBRARY_LINKAGE STREQUAL "dynamic")
+    message("DCMTK only supports static library linkage")
+    set(VCPKG_LIBRARY_LINKAGE static)
+endif()
+
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO DCMTK/dcmtk
+    REF DCMTK-3.6.3
+    SHA512 5863d0c05f046075b998bced7c8c71bf8e969dd366f26d48cdf26012ea744ae4a22784a5c3c12e12b0f188e997c93a6890ef0c3c336865ea93f13c45f70b258d
+    HEAD_REF master
+    PATCHES ${CMAKE_CURRENT_LIST_DIR}/dcmtk.patch
+)
+
+vcpkg_configure_cmake(
+    SOURCE_PATH ${SOURCE_PATH}
+    PREFER_NINJA
+    OPTIONS
+        -DDCMTK_WITH_DOXYGEN=OFF
+        -DDCMTK_WITH_ZLIB=OFF
+        -DDCMTK_WITH_OPENSSL=OFF
+        -DDCMTK_WITH_PNG=OFF
+        -DDCMTK_WITH_TIFF=OFF
+        -DDCMTK_WITH_XML=OFF
+        -DDCMTK_WITH_ICONV=OFF
+        -DDCMTK_FORCE_FPIC_ON_UNIX=ON
+        -DDCMTK_OVERWRITE_WIN32_COMPILER_FLAGS=OFF
+        -DDCMTK_ENABLE_BUILTIN_DICTIONARY=ON
+        -DDCMTK_ENABLE_PRIVATE_TAGS=ON
+        -DBUILD_APPS=OFF
+        -DDCMTK_ENABLE_CXX11=ON
+        -DCMAKE_DEBUG_POSTFIX="d"
+    OPTIONS_DEBUG
+        -DINSTALL_HEADERS=OFF
+        -DINSTALL_OTHER=OFF
+)
+
+vcpkg_install_cmake()
+vcpkg_copy_pdbs()
+
+vcpkg_fixup_cmake_targets()
+
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/share)
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
+
+# Handle copyright
+file(INSTALL ${SOURCE_PATH}/COPYRIGHT DESTINATION ${CURRENT_PACKAGES_DIR}/share/dcmtk RENAME copyright)