Add isort linter (#2)

Author: c-w

.travis.yml

@@ -7,10 +7,11 @@ python:
   - "3.6"
 
 before_script:
-  - pip install flake8
+  - pip install flake8 isort
 
 script:
   - flake8 benchmarks
+  - isort --check-only --recursive benchmarks
   - python3 -m benchmarks.tests
 
 before_deploy:

benchmarks/__main__.py

@@ -14,10 +14,10 @@
 from benchmarks.serialization import get_all as serializers
 from benchmarks.utils import Timer
 from benchmarks.utils import download_sample_emails
-from benchmarks.utils import remove_if_exists
 from benchmarks.utils import filesize_kb
 from benchmarks.utils import load_sample_email
 from benchmarks.utils import pretty_extension
+from benchmarks.utils import remove_if_exists
 
 Benchmark = namedtuple('Benchmark', (
     'Compressor',

setup.cfg

@@ -0,0 +1,6 @@
+[flake8]
+max-line-length = 120
+
+[isort]
+force_single_line = True
+line_length = 120