Adding an AUTHORS file

    An AUTHORS file is more descriptive and has more information now.
Theold MAINTAINERS file is deleted.

Signed-off-by: Rafael Campos Nunes <rafaelnunes@engineer.com>

Author: rafaelcn

AUTHORS

@@ -0,0 +1,14 @@
+Authors of Brain.
+
+  Copyright (C) 2015, 2016, 2017.
+
+  Copying and distribution of this file, with or without modification,
+  are permitted in any medium without royalty provided the copyright
+  notice and this notice are preserved.
+
+The following contributions warranted legal paper exchanges with the
+Brain authors.
+
+Luiz Peres						Brain maintainer.
+Rafael Campos Nunes				Brain maintainer.
+Manoel Vilela					Contributor.