Add support for running flake8 on travis

.flake8

@@ -0,0 +1,35 @@
+[flake8]
+max-line-length: 140
+# Whether to display the pep8 instructions on failure (can be quite verbose)
+show-pep8: False
+# Whether to show source code for each failure
+show-source: True
+# Maximum cyclomatic complexity allowed
+max-complexity: 14
+format: pylint
+exclude: .git,.idea,.eggs,__pycache__,.tox,docs/conf.py
+ignore:
+    # function is too complex
+    C901,
+    # continuation line under-indented for hanging indent
+    E121,
+    # continuation line over-indented for hanging indent
+    E126,
+    # whitespace before
+    E203,
+    # missing whitespace around arithmetic operator
+    E226,
+    # unexpected spaces around keyword / parameter equals
+    E251,
+    # at least two spaces before inline comment
+    E261,
+    # expected 2 blank lines, found 1
+    E302,
+    # multiple imports on one line
+    E401,
+    # test for membership should be 'not in'
+    E713,
+    # blank line contains whitespace
+    W293,
+    # blank line at end of file
+    W391,

.travis.yml

@@ -0,0 +1,40 @@
+
+branches:
+ only:
+  - master
+
+language: python
+
+matrix:
+  include:
+    - os: linux
+      python: "3.4"
+
+    - os: linux
+      python: "3.3.5"
+
+    - os: linux
+      python: "2.7"
+
+cache:
+  directories:
+    - $HOME/.pyenv/versions/3.5.2
+    - $HOME/.pyenv/versions/3.4.5
+    - $HOME/.pyenv/versions/3.3.6
+    - $HOME/.pyenv/versions/2.7.12
+    - $HOME/downloads
+
+install:
+  - python -m pip install --disable-pip-version-check --upgrade pip
+  - pip install -r requirements.txt
+  - pip install -r requirements-dev.txt
+
+script:
+  - flake8
+  - python setup.py sdist
+  - python setup.py bdist_wheel
+#  - python setup.py test
+
+after_success:
+#  - codecov -X gcov --required --file ./tests/coverage.xml
+

ctk_cli/__init__.py

@@ -1,3 +1,4 @@
+# flake8: noqa: F401
 from .module import CLIModule
 from .execution import (getXMLDescription, isCLIExecutable,
                        listCLIExecutables, popenCLIExecutable)