Reimplement monitor capture

- Implement windows monitor capture (code is so much cleaner than in
   OBS1).  Will implement duplication capture later

 - Add GDI texture support to d3d11 graphics library

 - Fix precision issue with sleep timing, you have to call
   timeBeginPeriod otherwise windows sleep will be totally erratic.

plugins/win-capture/CMakeLists.txt

@@ -0,0 +1,18 @@
+project(win-capture)
+
+set(win-capture_HEADERS
+	dc-capture.h)
+
+set(win-capture_SOURCES
+	dc-capture.c
+	monitor-capture.c
+	plugin-main.c)
+
+add_library(win-capture MODULE
+	${win-capture_SOURCES}
+	${win-capture_HEADERS})
+target_link_libraries(win-capture
+	libobs)
+
+install_obs_plugin(win-capture)
+install_obs_plugin_data(win-capture ../../build/data/obs-plugins/win-capture)