Add CMakeLists.txt and msvc_runtime.cmake.

- These files facilitate project/makefile generation.
- Remove old Visual Studio projects.
- Rename Makefile to Makefile.unix.

Change-Id: If786edd75d44c462538526c286eccc5cbf15d828

Makefile.unix

@@ -0,0 +1,53 @@
+CXX       := g++
+CXXFLAGS  := -W -Wall -g -MMD -MP
+LIBWEBMA  := libwebm.a
+LIBWEBMSO := libwebm.so
+WEBMOBJS  := mkvparser.o mkvreader.o mkvmuxer.o mkvmuxerutil.o mkvwriter.o
+OBJSA     := $(WEBMOBJS:.o=_a.o)
+OBJSSO    := $(WEBMOBJS:.o=_so.o)
+OBJECTS1  := sample.o
+OBJECTS2  := sample_muxer.o vttreader.o webvttparser.o sample_muxer_metadata.o
+OBJECTS3  := dumpvtt.o vttreader.o webvttparser.o
+OBJECTS4  := vttdemux.o webvttparser.o
+INCLUDES  := -I.
+DEPS      := $(WEBMOBJS:.o=.d) $(OBJECTS1:.o=.d) $(OBJECTS2:.o=.d)
+DEPS      += $(OBJECTS3:.o=.d) $(OBJECTS4:.o=.d)
+EXES      := samplemuxer sample dumpvtt vttdemux
+
+all: $(EXES)
+
+sample: sample.o $(LIBWEBMA)
+	$(CXX) $^ -o $@
+
+samplemuxer: $(OBJECTS2) $(LIBWEBMA)
+	$(CXX) $^ -o $@
+
+dumpvtt: $(OBJECTS3)
+	$(CXX) $^ -o $@
+
+shared: $(LIBWEBMSO)
+
+vttdemux: $(OBJECTS4) $(LIBWEBMA)
+	$(CXX) $^ -o $@
+
+libwebm.a: $(OBJSA)
+	$(AR) rcs $@ $^
+
+libwebm.so: $(OBJSSO)
+	$(CXX) $(CXXFLAGS) -shared $(OBJSSO) -o $(LIBWEBMSO)
+
+%.o: %.cpp
+	$(CXX) -c $(CXXFLAGS) $(INCLUDES) $< -o $@
+
+%_a.o: %.cpp
+	$(CXX) -c $(CXXFLAGS) $(INCLUDES) $< -o $@
+
+%_so.o: %.cpp
+	$(CXX) -c $(CXXFLAGS) -fPIC $(INCLUDES) $< -o $@
+
+clean:
+	$(RM) -f $(OBJECTS1) $(OBJECTS2) $(OBJECTS3) $(OBJECTS4) $(OBJSA) $(OBJSSO) $(LIBWEBMA) $(LIBWEBMSO) $(EXES) $(DEPS) Makefile.bak
+
+ifneq ($(MAKECMDGOALS), clean)
+  -include $(DEPS)
+endif