updated version and usage info

Author: rhulha

doc/usage.txt

@@ -9,7 +9,7 @@ create a HTML page and add a canvas similar to this:
 <canvas id="webgl-canvas" style="border: none; width:100%; height: 100%; display:block;"></canvas>
 
 in your dart file add this:
-import 'package:ChronosGL/chronos_gl.dart';
+import 'package:chronosgl/chronosgl.dart';
 
 void main() {
   ChronosGL chronosGL = new ChronosGL('#webgl-canvas', false);

pubspec.yaml

@@ -1,5 +1,5 @@
 name: chronosgl
-version: 1.0.4
+version: 1.0.5
 author: rhulha <java4life@gmail.com>
 description: A simple, minimal and elegant scene graph for WebGL written in Dart
 homepage: https://github.com/rhulha/ChronosGL