add basic cmake support

cmake/Modules/winconf-msvc.cmake

@@ -0,0 +1,21 @@
+if (STACKTRACE_WIN)
+    if ("${WINXXBITS}" STREQUAL "Win64")
+        add_compile_options(-Zi)
+    else ("${WINXXBITS}" STREQUAL "Win64")
+        # i686 arch requires frame pointer preservation
+        add_compile_options(-Oy-)
+    endif ("${WINXXBITS}" STREQUAL "Win64")
+    link_libraries(dbghelp.lib)
+endif (STACKTRACE_WIN)
+
+# Enable Wide characters
+add_definitions(-DTORRENT_USE_WPATH)
+
+if (NOT QT5)
+    # Qt4 does not detect it itself
+    add_definitions(-DQ_COMPILER_INITIALIZER_LISTS)
+endif (NOT QT5)
+
+include(MacroConfigureMSVCRuntime)
+set(MSVC_RUNTIME "dynamic")
+configure_msvc_runtime()