Update README with installation and development instructions.

Author: hdeshev

README.md

@@ -1 +1,46 @@
 Integrating NativeScript with Angular 2.
+
+# Running locally
+
+
+## Get submodule code
+
+The project bundles the NativeScript modules and Angular as source code dependencies set up as git submodules. You need to get them by running:
+
+$ git submodule update --init
+
+## Install dependencies
+
+You will need the [Android SDK](https://developer.android.com/sdk/) to build this project. Install it manually.
+
+Then install the NativeScript tools according to: [this article](http://docs.nativescript.org/setup/quick-setup).
+
+Then install the needed NPM packages:
+
+$ npm install
+
+## Compile and prepare NativeScript and Angular
+
+$ (cd deps/angular/modules/angular2 && tsd reinstall)
+$ grunt prepare
+
+## Initialize the test NativeScript app (ng-sample)
+
+$ grunt shell:ngSampleInit
+
+## Compile the app and update its `./src` dir:
+
+$ grunt ng-sample
+
+# Developer workflow:
+
+1. Make some changes to the app or `src/nativescript-angular`
+2. Navigate to the ng-sample subdir: `cd ng-sample`
+2. Compile app: `grunt app`
+3. Run in emulator `tns emulate android --avd <YOUR-AVD>`
+
+Protip: combine #2 and #3 above in a single command run from the project root directory (works only on Unixy shells):
+
+(cd ng-sample && grunt app && tns emulate android --avd nexus4-x64)
+
+On Windows, you can wrap those commands in a BAT file.