Introduce the --app key (alias to --git). Update readme.

README.md

@@ -81,9 +81,11 @@ git commit -m "Initial commit"
 Then run it with
 
 ```
-allcountjs --git file://<path to allcountjs-helloworld> --db mongodb://localhost:27017/allcountjs-helloworld
+allcountjs --app <path or URL> --db mongodb://localhost:27017/allcountjs-helloworld
 ```
 
+`<path or URL>` can be regular path to the directory where application located (e.g. `./` or `/home/user/allcountjs-helloworld`) or URL (e.g. `file:///home/user/allcountjs-helloworld` or `https://github.com/user/my-app.git`). It doesn't matter whether `<path or URL>` points to regular directory or Git repository.
+
 Please note that MongoDB should be running in order to run this example.
 
 # License

allcount.js

@@ -6,11 +6,11 @@ var _ = require('lodash');
 var fs = require('fs');
 
 var port = argv.port || process.env.PORT || 9080;
-var gitUrl = argv.git || process.env.GIT_URL;
+var gitUrl = argv.app || process.env.APP || argv.git || process.env.GIT_URL;
 var dbUrl = argv.db || process.env.DB_URL;
 
 if (!gitUrl || !dbUrl) {
-    console.log('Usage: allcountjs --git <Application Git URL> --db <Application MongoDB URL> -port [Application HTTP port]');
+    console.log('Usage: allcountjs --app <Path to application\'s dir or Git URL> --db <Application MongoDB URL> -port [Application HTTP port]');
     process.exit(0);
 }