Added license badge

VyacheslavHashov · web-flow · commit 62cdbb9af6ac · 2017-01-02T01:00:29.000+03:00
diff --git a/README.md b/README.md
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+[![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/VyacheslavHashov/postgres-wire/master/LICENSE)
 # postgres-wire
 A pure Haskell implementation of Postgres wire protocol version 3.0

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	`1`	`+[![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/VyacheslavHashov/postgres-wire/master/LICENSE)`
`1`	`2`	`# postgres-wire`
`2`	`3`	`A pure Haskell implementation of Postgres wire protocol version 3.0`