Ignore spurious pylint warnings

pylint complains about several stylistic issues with our code that are
always low priority (e.g., import order). This commit ignores some of
the most annoying warnings, so built-in linters (in emacs, etc.) are
more useful for catching real issues.

.pylintrc

@@ -137,7 +137,12 @@ disable=print-statement,
         missing-docstring,
         bad-whitespace,
         line-too-long,
-        invalid-name
+        invalid-name,
+        wrong-import-order,
+        multiple-imports,
+        no-else-return,
+        unscriptable-object,
+        relative-beyond-top-level
 
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