Add support for parsing config files

Right now only alias keyword is treated.
diff --git a/Makefile.am b/Makefile.am
index 9da0454..f17270f 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -33,6 +33,7 @@
 	libkmod/libkmod.c \
 	libkmod/libkmod-list.c \
 	libkmod/libkmod-loaded.c \
+	libkmod/libkmod-config.c \
 	libkmod/libkmod-util.c \
 	libkmod/libkmod-module.c