Updated README.md

Edited the word 'lets you' to 'enables you to', which I think is better for this sentence. The word 'enable' here gives the readers a feeling that the architecture makes some awesome things possible, while 'let' is more like to give some permissions to the users.

README.md

@@ -12,7 +12,7 @@
 **TensorFlow** is an open source software library for numerical computation using
 data flow graphs.  The graph nodes represent mathematical operations, while
 the graph edges represent the multidimensional data arrays (tensors) that flow
-between them.  This flexible architecture lets you deploy computation to one
+between them.  This flexible architecture enables you to deploy computation to one
 or more CPUs or GPUs in a desktop, server, or mobile device without rewriting
 code.  TensorFlow also includes TensorBoard, a data visualization toolkit.