README: update for standard readme compliance, including adding a LIC…

…ENSE, plus a Gitter badge, etc. (#156)

* Add a short description, standard readme style

* Add a Gitter badge

* Update for standard readme compliance

* Add a Casper Gitter badge, update the existing one to Casper Scaling and protocol economics

* Create LICENSE

* Fix Gitter casper scaling and protocol economics badge, update Gitter link

* Remove repeated contribute section

* Add a made by badge

* Remove :

LICENSE

@@ -0,0 +1,24 @@
+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <http://unlicense.org>

README.md

@@ -1,18 +1,19 @@
 # Casper
 
+[![](https://img.shields.io/badge/made%20by-Ethereum%20Foundation-blue.svg?style=flat-square)](http://ethereum.org)
 [![Build Status](https://travis-ci.org/ethereum/casper.svg?branch=master)](https://travis-ci.org/ethereum/casper)
+[![Casper](https://img.shields.io/badge/gitter-Casper-4AB495.svg)](https://gitter.im/ethereum/casper)
+[![Casper scaling and protocol economics](https://img.shields.io/badge/gitter-Casper%20scaling%20and%20protocol%20economics-4AB495.svg)](https://gitter.im/ethereum/casper-scaling-and-protocol-economics)
+[![standard-readme compliant](https://img.shields.io/badge/readme%20style-standard-brightgreen.svg?style=flat-square)](https://github.com/RichardLitt/standard-readme)
 
-## Resources
+> Implements Casper FFG (the Friendly Finality Gadget), a Proof-of-Stake finality protocol on top of Proof-of-Work.
 
+## Background
+
+- Implements a [Casper FFG](https://arxiv.org/abs/1710.09437) smart contract, written in [Vyper](https://github.com/ethereum/vyper).
+- See this [Casper the Friendly Finality Gadget](https://arxiv.org/abs/1710.09437) paper by Vitalik Buterin and Virgil Griffith introducing Casper FFG.
 - [EIP-1011](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1011.md):
 specification of the Casper the Friendly Finality Gadget (FFG) PoW/PoS consensus model.
-- [VALIDATOR_GUIDE.md](https://github.com/ethereum/casper/blob/master/VALIDATOR_GUIDE.md):
-information about implementing a Casper FFG validator.
-- [Casper the Friendly Finality Gadget](https://arxiv.org/abs/1710.09437): 
-  paper by Vitalik Buterin and Virgil Griffith introducing Casper FFG.
-
-## Casper Contract
-Implements [Casper FFG](https://arxiv.org/abs/1710.09437), written in [Vyper](https://github.com/ethereum/vyper).
 
 ## Installation
 
@@ -31,12 +32,21 @@ pip3 install -r requirements.txt
 NOTE: pip3 is a version of pip using python version 3.
 NOTE: we suggest using virtualenv to sandbox your setup.
 
+## Usage
+
+- [VALIDATOR_GUIDE.md](https://github.com/ethereum/casper/blob/master/VALIDATOR_GUIDE.md):
+information about implementing a Casper FFG validator.
+
+## Contribute
+
+Feel free to ask questions in our [Gitter room](https://gitter.im/ethereum/casper) or open an [issue](https://github.com/ethereum/casper/issues) for feature requests or bug reports. Feel free to make a PR!
+
+## License
+
+[UNLICENSE](LICENSE)
+
 ## Tests
 
 ```bash
 pytest tests
 ```
-
-## Contribute
-
-Join the conversation here: [https://gitter.im/ethereum/casper](https://gitter.im/ethereum/casper)