initial docs for find and flake8 cleanup

var/spack/repos/builtin/packages/py-autopep8/package.py

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+from spack import *
+
+class PyAutopep8(Package):
+    """Automatic pep8 formatter"""
+    homepage = "https://github.com/hhatto/autopep8"
+    url      = "https://github.com/hhatto/autopep8/archive/ver1.2.2.tar.gz"
+
+    version('1.2.2', 'def3d023fc9dfd1b7113602e965ad8e1')
+
+    extends('python')
+    depends_on('py-setuptools')
+    depends_on('py-pep8')
+
+    def install(self, spec, prefix):
+        python('setup.py', 'install', '--prefix=%s' % prefix)
+

var/spack/repos/builtin/packages/py-pep8/package.py

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+from spack import *
+
+class PyPep8(Package):
+    """python pep8 format checker"""
+    homepage = "https://github.com/PyCQA/pycodestyle"
+    url      = "https://github.com/PyCQA/pycodestyle/archive/1.7.0.tar.gz"
+
+    version('1.7.0', '31070a3a6391928893cbf5fa523eb8d9')
+
+    extends('python')
+    depends_on('py-setuptools')
+
+    def install(self, spec, prefix):
+        python('setup.py', 'install', '--prefix=%s' % prefix)
+