Add a new "ini" command

This allows you to read ini-formatted data from anywhere and then
import one of the sections into the environment

This is based on rev 16 at http://code.google.com/p/inih/

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/README b/README
index a668748..18354d3 100644
--- a/README
+++ b/README
@@ -816,6 +816,7 @@
 		CONFIG_CMD_IMLS		  List all found images
 		CONFIG_CMD_IMMAP	* IMMR dump support
 		CONFIG_CMD_IMPORTENV	* import an environment
+		CONFIG_CMD_INI		* import data from an ini file into the env
 		CONFIG_CMD_IRQ		* irqinfo
 		CONFIG_CMD_ITEST	  Integer/string test of 2 values
 		CONFIG_CMD_JFFS2	* JFFS2 Support