update README.md and LICENSE. (#43)

Author: smola

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2016 Miguel Molina
+Copyright (c) 2016 Miguel Molina, Santiago M. Mola, Antonio J. Navarro, David Pordomingo
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -1,3 +1,56 @@
 <img src="https://rawgit.com/gitql/gitql/master/gitql-logo.svg" alt="gitql" width="250"/> 
 
-[![Build Status](https://travis-ci.org/gitql/gitql.svg?branch=master)](https://travis-ci.org/gitql/gitql) [![codecov](https://codecov.io/gh/gitql/gitql/branch/master/graph/badge.svg)](https://codecov.io/gh/gitql/gitql) [![GoDoc](https://godoc.org/github.com/gitql/gitql?status.svg)](https://godoc.org/github.com/gitql/gitql)
+image:https://travis-ci.org/gitql/gitql.svg?branch=master[Build Status,link=https://travis-ci.org/gitql/gitql] image:https://codecov.io/gh/gitql/gitql/branch/master/graph/badge.svg[codecov,link=https://codecov.io/gh/gitql/gitql] image:https://godoc.org/github.com/gitql/gitql?status.svg[GoDoc,link=https://godoc.org/github.com/gitql/gitql]
+
+**gitql** is a SQL interface to Git repositories, written in Go.
+
+## Installation
+
+Check the [Releases](https://github.com/gitql/gitql/releases) page to download
+the gitql binary.
+
+## Usage
+
+```
+Usage:
+  gitql [OPTIONS] <query | version>
+
+Help Options:
+  -h, --help  Show this help message
+
+Available commands:
+  query    Execute a SQL query a repository.
+  version  Show the version information.
+```
+
+For example:
+
+```bash
+$ cd my_git_repo
+$ gitql query 'SELECT hash, author_email, author_name FROM commits LIMIT 2;' 
+SELECT hash, author_email, author_name FROM commits LIMIT 2;
++------------------------------------------+--------------------+---------------+
+|                   HASH                   |   AUTHOR EMAIL     |  AUTHOR NAME  |
++------------------------------------------+--------------------+---------------+
+| 02e0aa0ef807d2ae4d02ecdbe37681db9e812544 | Santiago M. Mola   | [email protected] |
+| 034cb63f77f4a0d30d26dabb999d348be6640df7 | Antonio J. Navarro | [email protected] |
++------------------------------------------+--------------------+---------------+
+```
+
+## Tables
+
+*TODO*
+
+## SQL syntax
+
+gitql supports a subset of the SQL standard, currently including:
+
+* `SELECT`
+* `WHERE`
+* `ORDER BY` (with `ASC` and `DESC`)
+* `LIMIT`
+
+## License
+
+gitql is licensed under the
+https://github.com/gitql/gitql/blob/master/LICENSE[MIT License].