[gnome-builder] README: migrate readme to markdown

[Christian Hergert <chergert src gnome org>]

commit 884b19d5abf3b8e0ae19bc507ec5e9d21362945a
Author: Christian Hergert <chergert redhat com>
Date:   Thu Sep 21 01:54:00 2017 -0700

    README: migrate readme to markdown

 README    |   58 ----------------------------------------------------------
 README.md |   47 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+), 58 deletions(-)
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diff --git a/README.md b/README.md
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+# Builder
+
+Develop software for GNOME
+
+## Helpful Links
+
+ * [Read the documentation](http://builder.readthedocs.io/en/latest/)
+ * [File a Bug on Bugzilla](https://bugzilla.gnome.org/enter_bug.cgi?product=gnome-builder)
+ * [Download a Release Tarball](https://download.gnome.org/sources/gnome-builder/)
+ * [Browse source code in Git version control](https://git.gnome.org/browse/gnome-builder)
+ * [Learn more about Builder](https://wiki.gnome.org/Apps/Builder)
+ * [Chat with the developers](irc://irc.gnome.org/#gnome-builder)
+
+----
+
+Builder aims to be an IDE for writing GNOME-based software.
+We believe this focus will help us build something great for our community.
+
+If you would like to help in this effort, join our IRC channel and we will help you find something to work 
on.
+
+Builder is primarily written in C and Python.
+Some aspects of Builder may be written in another language when it makes sense.
+
+Builder is developed in conjunction with GNOME releases.
+This means that we often contribute to, and rely on, features being developed in other GNOME modules such as 
Gtk.
+
+----
+
+Builder is built using meson:
+
+```sh
+meson --prefix=/usr build
+ninja -C build
+sudo ninja -C build install
+```
+
+For more information on building and installing Builder,
+[read our installation guide](http://builder.readthedocs.io/en/latest/installation.html)
+to help you through the process.
+
+----
+
+Builder is licensed under the GNU General Public License as published by the
+Free Software Foundation, either version 3 of the License, or (at your option)
+any later version. Some files are individually licensed under alternative
+licenses such as LGPL-2.1+ and LGPL-3.0.
+