Move configuration functions into inc/*

* config/INI functions from functions-common to to inc/ini-config
* local.conf meta-config functions from lib/config to inc/meta-config

Change-Id: I00fab724075a693529273878875cfd292d00b18a
diff --git a/stack.sh b/stack.sh
index bf9fc01..2060f2d 100755
--- a/stack.sh
+++ b/stack.sh
@@ -92,7 +92,7 @@
 source $TOP_DIR/functions
 
 # Import config functions
-source $TOP_DIR/lib/config
+source $TOP_DIR/inc/meta-config
 
 # Import 'public' stack.sh functions
 source $TOP_DIR/lib/stack