adding documentation

Author: Shlomi Noach

README.md

@@ -1,2 +1,19 @@
-# gh-ost
-GitHub's Online Schema Change for MySQL
+# gh-ost: GitHub's online schema migration for MySQL
+
+`gh-ost` allows for online schema migrations in MySQL
+
+
+## What's in a name?
+
+Originally this was named `gh-osc`: GitHub Online Schema Change, in the likes of [Facebook online schema change](https://www.facebook.com/notes/mysql-at-facebook/online-schema-change-for-mysql/430801045932/) and [pt-online-schema-change](https://www.percona.com/doc/percona-toolkit/2.2/pt-online-schema-change.html).
+
+But then a rare genetic mutation happened, and the `s` transformed into `t`. And that sent us down the path of trying to figure out a new acronym. Right now, `gh-ost` (pronounce: _Ghost_), stands for:
+- GitHub Online Schema Translator/Transformer/Transfigurator
+
+## Authors
+
+`gh-ost` was designed, authored, reviewed and tested by the database infrastructure team at GitHub:
+- @jonahberquist
+- @ggunson
+- @tomkrouper
+- @shlomi-noach