Run syntax checker during travis build

.travis.yml

@@ -4,7 +4,12 @@ python:
 # command to install dependencies
 install:
   - pip install -r requirements.txt
+  - pip install pyflakes
   # Deal with issue on Travis builders re: multiprocessing.Queue :(
   - "sudo rm -rf /dev/shm && sudo ln -s /run/shm /dev/shm"
 # command to run tests
-script: make unit functional
+script:
+  - make unit functional
+  # Check that there are no syntax errors
+  - find lettuce -type f -name "*.py" -print | xargs python -m py_compile
+  - find lettuce -type f -name "*.py" -print | xargs pyflakes

lettuce/django/server.py

@@ -194,7 +194,7 @@ def run(self):
             httpd_cls = WSGIServer
 
         try:
-            s = connector.connect((self.address, self.port))
+            connector.connect((self.address, self.port))
             self.lock.release()
             os.kill(os.getpid(), 9)
         except socket.error:

lettuce/plugins/xunit_output.py

@@ -19,7 +19,6 @@
 from lettuce.terrain import after
 from lettuce.terrain import before
 from xml.dom import minidom
-from lettuce.strings import utf8_string
 
 
 def wrt_output(filename, content):