added layout description...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>

ui (gen4)/doc/PROJECT-LAYOUT

@@ -0,0 +1,46 @@
+
+
+Basic project layout:
+---------------------
+
+	imagegrid/		- domain-specific modules...
+
+	features/		- feature modules...
+		_feature.js	- feature template
+		all.js		- feature loader
+				  this module includes all the
+				  feature modules to be used in the
+				  system.
+		meta.js		- feature configuration and
+				  meta-features
+
+	workers/		- workers...
+
+	lib/			- generic library modules...
+		widgets/	- generic widgets...
+		_module.js	- module template...
+		_template.js	- generic js file template...
+
+	ext-lib/		- external library modules...
+
+	node_modules/		- npm modules...
+		ig-*/		- ImageGrid npm modules
+
+	css/			- css/less files
+		widgets/	- widget-specific css...
+
+	images/			- system images...
+
+	doc/			- various documentation...
+		PROJECT-LAYOUT	- this file
+		BUILD-NOTES	- notes on the build process
+		NOTES		- general notes...
+
+	experiments/		- standalone experiments...
+
+	package.json		- npm/nw configuration...
+	ig.js			- CLI entry point...
+	index.html		- Browser/NW entry point...
+	ui.js			- GUI root setup...
+
+