Updated Readme'

Author: Tika Pahadi

README.md

@@ -4,6 +4,13 @@ Demo: https://dev.tika.me/ti-grid/
 
 Grids like they should be (simple & powerful):
 
+Installation:
+
+```
+  npm install ti-grid
+```
+
+Usage:
 ```
  <ti-grid
     [columns]="columns"