doctest needed a teardown fixture, pep8 work

this was the real fix for #316, not sure why this did not show up when
testing on linux mint

glymur/test/test_jp2box.py

@@ -27,12 +27,17 @@ from .fixtures import (WARNING_INFRASTRUCTURE_ISSUE,
                        WINDOWS_TMP_FILE_MSG, MetadataBase)
 
 
+def docTearDown(doctest_obj):
+    glymur.set_parseoptions(full_codestream=False)
+
+
 def load_tests(loader, tests, ignore):
     """Run doc tests as well."""
     if os.name == "nt":
         # Can't do it on windows, temporary file issue.
         return tests
-    tests.addTests(doctest.DocTestSuite('glymur.jp2box'))
+    tests.addTests(doctest.DocTestSuite('glymur.jp2box',
+                                        tearDown=docTearDown))
     return tests
 
 

setup.py

@@ -21,6 +21,7 @@ kwargs = {'name': 'Glymur',
           'test_suite': 'glymur.test'}
 
 install_requires = ['numpy>=1.7.0', 'lxml>=3.0.0']
+test_requires = []
 if sys.hexversion < 0x03030000:
     install_requires.append('contextlib2>=0.4')
     test_requires.append('mock>=1.0.1')