Fixed entrypoint case typo. Add Pmw as dep.

setup.py

@@ -25,10 +25,12 @@ setup(
     description="Find and review MSEED files.",
     entry_points={
         'console_scripts': [
-            'ckmseed=ckmseed.ckmseed:main',
+            'ckmseed=ckMseed.ckMseed:main',
         ],
     },
-    install_requires=[],
+    install_requires=[
+        'Pmw',
+        ],
     setup_requires = [],
     license="GNU General Public License v3",
     long_description=readme + '\n\n' + history,