Update README.md

update the readme to explain how to workaround the limitations (not supporting dynamic require statements and lack of native module support the pseudo support of __dirname)

README.md

@@ -20,9 +20,69 @@ Nexe is a command-line utility that compiles your Node.js application into a sin
 - Linux / Mac / BSD / Windows
 - Windows: Python 2.6 or 2.7 (in PATH), Visual Studio 2010 or 2012
 
-## Caveats
+##Caveats
 
-- Doesn't support native modules (yet).
+### Doesn't support native modules
+
+- Use the techniques below for working around dynamic require statments to exclude the module from the bundling, and deploy along side the executable in a node_module folder so your app can find it.
+ 
+###Doesn't support dynamic require statments
+Such As:
+```
+var x = require(someVar);
+```
+
+In this case nexe won't bundle the file
+
+```
+	var x;
+	if (someCheck) {
+		x = require("./ver1.js");
+	}
+	else {
+		x = require("./var2.js");
+	}
+```
+
+In this case nexe will bundle both files.
+	
+Workarounds:
+1) for dyanmic requires that you want bundled add the following into your project
+```
+	var dummyToForceIncludeForBundle = false;
+	if (dummyToForceIncludeForBundle) {
+		require("./loadedDynamicallyLater.js");
+		...
+	}
+```
+this will trick the bundler into including them.
+	
+2) for dynamic files getting included that you don't want to be
+```
+	var moduleName = "./ver2.js";
+	if (someCheck) {
+		moduleName = "./ver1.js";
+	}
+	var x = require(moduleName)
+```
+Note: neither file will be bundled.
+	
+Using these two techniques you can change your application code so mdoules are not bundles, and generate a includes.js file as part of your build process so that the right files get bundled for your build configuration.
+
+### __dirname
+
+Once the module is budnled it is part of the executable. __dirname is therefore the CWD (current working dir) of the executable when run. Thus if you put resources on a realtive path from the cwd of the executable (in most cases the path to the executable) your app will be able to access them.
+
+If you had a data file at /dev/myNodeApp/stateManager/handler/data/some.csv
+and a file at /dev/myNodeApp/stateManager/handler/loader.js
+```
+	module.exports = fw.readFileSync(path.join(__dirname, "./data/some.csv"));
+```
+you would need to deploy some.csv in a sub dir data/ along side your executable
+
+There are potential use cases for __dirname where the CWD is not the correct substitution, and could result in a silent error (possibly even in a dependciey that you are unaware of).
+
+Note: __filename will be 'undefined'
 
 ## Installation