added .gitignore files, ready for the switch

.gitignore

@@ -0,0 +1,21 @@
+Makefile
+Makefile.in
+aclocal.m4
+autom4te.cache
+config.guess
+config.sub
+configure
+depcomp
+install-sh
+ltmain.sh
+missing
+.libs
+.deps
+config.log
+config.status
+libtool
+*.l[ao]
+*.[ao]
+y.tab.[ch]
+lex.yy.c
+*keywords.c