README.md + updating cabal

Summary:
* basic `README.md`
* updated `duckling.cabal`

Reviewed By: JonCoens

Differential Revision: D4691967

fbshipit-source-id: 0a5cdf7

README.md

@@ -0,0 +1,30 @@
+# Duckling
+Duckling is a Haskell library that parses text into structured data.
+
+## Requirements
+A Haskell environment is required. We recommend using
+[stack](https://haskell-lang.org/get-started).
+
+## Quickstart
+To compile and run the binary:
+```
+$ stack build
+$ stack exec duckling-example-exec
+```
+The first time you run it, it will download all required packages.
+
+To run a source file directly (after compiling once):
+```
+$ stack ExampleMain.hs
+```
+
+See `ExampleMain.hs` for an example on how to integrate Duckling in your
+project.
+
+To regenerate the classifiers and run the tests:
+```
+$ stack RegenMain.hs && stack TestMain.hs
+```
+
+## License
+Duckling is BSD-licensed. We also provide an additional patent grant.

duckling.cabal

@@ -1,18 +1,23 @@
 name:                duckling
 version:             0.1.0.0
--- synopsis:
--- description:
-homepage:            https://github.com/githubuser/duckling#readme
-license:             OtherLicense
+synopsis:            A Haskell library for parsing text into structured data.
+description:
+  Duckling is a library for parsing text into structured data.
+homepage:            https://github.com/facebookincubator/duckling#readme
+bug-reports:         https://github.com/facebookincubator/duckling/issues
+license:             BSD
 license-file:        LICENSE
-author:              Author name here
+author:              Facebook, Inc.
 maintainer:          example@example.com
-copyright:           2017 Author name here
+copyright:           Copyright (c) 2014-present, Facebook, Inc.
 category:            Systems
 build-type:          Simple
-extra-source-files:  README.md
+stability:           alpha
 cabal-version:       >=1.10
 
+extra-source-files:    README.md
+                     , PATENTS
+
 library
   exposed-modules:     Duckling.Core
                      , Duckling.Debug
@@ -679,4 +684,4 @@ executable duckling-example-exe
 
 source-repository head
   type:     git
-  location: https://github.com/githubuser/duckling
+  location: https://github.com/facebookincubator/duckling