Add a .gitignore file

.gitignore

+*.o
+*.lo
+*.la
+*.pc
+.*.swp
+*~
+.deps*
+.libs*
+Makefile
+Makefile.in
+aclocal.m4
+autom4te.cache
+compile
+config.guess
+config.h
+config.h.in
+config.log
+config.rpath
+config.status
+config.sub
+configure
+depcomp
+install-sh
+libltdl
+libtool
+ltmain.sh
+missing
+mkinstalldirs
+stamp-*
+