[baobab] Update README and port to markdown

[Stefano Facchini <sfacchini src gnome org>]

commit f7aac707c40c9717fd01c567acfeeb31f60b59d1
Author: Stefano Facchini <stefano facchini gmail com>
Date:   Sat Oct 13 10:34:34 2018 +0200

    Update README and port to markdown

 README    | 31 -------------------------------
 README.md | 15 +++++++++++++++
 2 files changed, 15 insertions(+), 31 deletions(-)
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diff --git a/README.md b/README.md
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+# Baobab
+
+Baobab is the GNOME [Disk Usage Analyzer](https://wiki.gnome.org/Apps/DiskUsageAnalyzer).
+
+Baobab is a simple application which can scan either specific folders
+(local or remote) or volumes and give a graphical representation
+including each directory size or percentage in the branch. It also
+auto-detects any mounted/unmounted device.
+
+
+## Hacking
+
+The code lives at GNOME [GitLab](https://gitlab.gnome.org/GNOME/baobab).
+
+Report issues to the GNOME [issue tracking system](https://gitlab.gnome.org/GNOME/baobab/issues).