Update README.md

README.md

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-<img src=https://raw.githubusercontent.com/tqchen/tvmlang.org/master/images/logo/tvm-logo-small.png width=128/> Tensor IR Stack for Deep Learning Systems
+<img src=https://raw.githubusercontent.com/tqchen/tvmlang.org/master/images/logo/tvm-logo-small.png width=128/> Open Deep Learning Compiler Stack
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 [![GitHub license](http://dmlc.github.io/img/apache2.svg)](./LICENSE)
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 [Community](http://tvmlang.org/community.html) |
 [Release Notes](NEWS.md)
 
-TVM is a Tensor intermediate representation(IR) stack for deep learning systems. It is designed to close the gap between the
+TVM is a compiler stack for deep learning systems. It is designed to close the gap between the
 productivity-focused deep learning frameworks, and the performance- and efficiency-focused hardware backends.
 TVM works with deep learning frameworks to provide end to end compilation to different backends.
 Checkout the [tvm stack homepage](http://tvmlang.org/)  for more information.