MNT: Incorrect use of find_packages, causing tests to be installed

setup.py

@@ -27,8 +27,7 @@ with open(op.join(basedir, 'requirements.txt'), 'rt') as f:
 with open(op.join(basedir, 'requirements-extra.txt'), 'rt') as f:
     extra_requires = {'extras' : [l.strip() for l in f.readlines()]}
 
-packages = find_packages(
-    exclude=('doc', 'tests', 'dist', 'build', 'fslpy.egg-info'))
+packages = find_packages(include=('fsl', 'fsl.*'))
 
 # Figure out the current fslpy version, as defined in fsl/version.py. We
 # don't want to import the fsl package,  as this may cause build problems.