gitignore configure, libtool, and compilation/linking output.

.gitignore

 *~
+*.o
+*.lo
+*.la
 test-oop
 *.pc
+/.libs
+/.deps
 # autoconf related
 configure
 aclocal.m4
 autom4te.cache
+config.log
+config.status
+Makefile
 # automake related
 Makefile.in
 compile
@@ -12,4 +20,5 @@ config.guess
 config.sub
 depcomp
 ltmain.sh
+libtool
 missing