BLD/STY: Upgrade to latest versions of lint checkers.

Upgrade pep8 1.4.6 -> 1.5.7
Upgrade pyflakes 0.7.3 -> 0.8.1

Also, tweak some line indentations which now show up as errors,
because of the fixes/changes to visual indent detection between
pep8 versions.

etc/requirements_dev.txt

@@ -9,8 +9,8 @@ mock==1.0.1
 
 flake8==2.1.0
 mccabe==0.2.1
-pep8==1.4.6
-pyflakes==0.7.3
+pep8==1.5.7
+pyflakes==0.8.1
 pip-tools==0.3.4
 
 # Documentation Conversion

tests/test_exception_handling.py

@@ -82,7 +82,7 @@ class ExceptionTestCase(TestCase):
                 'handle_data',
                 self.zipline_test_config['sid'],
                 sim_params=factory.create_simulation_parameters()
-            )
+        )
 
         zipline = simfactory.create_test_zipline(
             **self.zipline_test_config
@@ -102,7 +102,7 @@ class ExceptionTestCase(TestCase):
             DivByZeroAlgorithm(
                 self.zipline_test_config['sid'],
                 sim_params=factory.create_simulation_parameters()
-            )
+        )
 
         zipline = simfactory.create_test_zipline(
             **self.zipline_test_config
@@ -122,7 +122,7 @@ class ExceptionTestCase(TestCase):
             SetPortfolioAlgorithm(
                 self.zipline_test_config['sid'],
                 sim_params=factory.create_simulation_parameters()
-            )
+        )
 
         zipline = simfactory.create_test_zipline(
             **self.zipline_test_config

tests/test_perf_tracking.py

@@ -704,8 +704,8 @@ class TestPositionPerformance(unittest.TestCase):
             trades[-1]['price'],
             "last sale should be same as last trade. \
             expected {exp} actual {act}".format(
-            exp=trades[-1]['price'],
-            act=pp.positions[1].last_sale_price)
+                exp=trades[-1]['price'],
+                act=pp.positions[1].last_sale_price)
         )
 
         self.assertEqual(