Move gala up a notch

@takluyver suggested that projects here might be ranked by github stars.
I won't say no. =)

Author: jni

_sections/30-projects.md

@@ -16,5 +16,6 @@ style: center
 - [PyStan](https://github.com/stan-dev/pystan)
 - [An Introduction to Applied Bioinformatics](http://readiab.org)
 - [QIIME](http://qiime.org)
-- [cual-id](https://github.com/johnchase/cual-id)
 - [gala](https://gala.readthedocs.io)
+- [cual-id](https://github.com/johnchase/cual-id)
+