use cmake as new build system and add gitignore

It is time to drop old Makefile.

.gitignore

@@ -0,0 +1,40 @@
+*~
+*.o
+*.lo
+*.la
+*.orig
+*.rej
+*.loT
+*.bin
+*.pc
+.deps
+.libs
+install-sh
+libtool
+ltmain.sh
+compile
+missing
+Makefile
+Makefile.in
+config.h
+config.h.in
+stamp-h1
+aclocal.m4
+autom4te.cache
+config.guess
+config.log
+config.status
+config.sub
+configure
+depcomp
+TAGS
+/debian.upstream/changelog
+/debian.upstream/control
+/debian.upstream/libva-vdpau-driver.install
+CMakeFiles
+CMakeCache.txt
+*\.so
+*\.a
+cmake_install.cmake
+install_manifest.txt
+*\.debhelper\.log