Don't catch BaseExceptions (#161)

Exiting exceptions, such as `KeyboardInterrupt`, inherit from `BaseException` rather than `Exception`. The idiomatic way to catch any unexpected exception is to only catch `Exception`, so that `BaseExceptions` still bubble up.

django_ses/__init__.py

@@ -91,7 +91,7 @@ def open(self):
                 proxy_user=self._proxy_user,
                 proxy_pass=self._proxy_pass,
             )
-        except:
+        except Exception:
             if not self.fail_silently:
                 raise
 
@@ -101,7 +101,7 @@ def close(self):
         try:
             self.connection.close()
             self.connection = None
-        except:
+        except Exception:
             if not self.fail_silently:
                 raise
 

setup.py

@@ -106,7 +106,7 @@ def find_package_data(where=".", package="", exclude=standard_exclude,
 LONG_DESCRIPTION = None
 try:
     LONG_DESCRIPTION = open('README.rst').read()
-except:
+except Exception:
     pass
 
 CLASSIFIERS = [