maint: add note on why the repository is small

Author: carandraug

README

@@ -2,6 +2,13 @@ This repository has a collection of different scripts written and used in our
 lab. They vary widely by application and the organization of the repository is
 a bit loose, so make sure you check all the subdirectories.
 
+If this repository looks a bit empty, or if the scripts look too simple,
+that's a good thing. We aim to implement the things we need in other bigger
+projects, thus being useful for a larger group of people. It also means that
+it's much easier for others to find and install our work, since the other
+projects will already have distribution methods (and are packaged by many
+Linux distributions).
+
 Note that each script may be written on its own language and be dependent on
 external libraries and/or applications such as BioPerl.