Adding tox setup for testing

Allows for more consistent testing (CI and local) through the use of tox
controlled virtualenv's to execute your tests.

Also, switched the Travis CI config to use the project's tox setup.

New way of executing your tests:
# If needed
pip install tox

# Execute tox
tox

.gitignore

@@ -9,6 +9,7 @@
 mp-virtualenv
 .idea
 .*deps
+.tox
 mailpile.egg-info/
 mailpile-tmp.py
 mailpile/www/default/config.codekit

.travis.yml

@@ -1,15 +1,17 @@
 language: python
-python:
-  - "2.7"
+python: 2.7
+env:
+  - TOX_ENV=py27
+
 before_install:
   - sudo apt-get update
-  - sudo apt-get install gnupg
+  - sudo apt-get install -y gnupg
+
 install:
-  - pip install -r requirements.txt --use-mirrors
-  - pip install coverage coveralls nose --use-mirrors
+  - pip install tox coveralls
+
 script:
-  - "python setup.py install"
-  - "nosetests mailpile.tests --with-coverage --cover-package=mailpile"
-after_success:
-  - "coveralls"
+  - tox -e $TOX_ENV
 
+after_success:
+  - coveralls

test-requirements.txt

@@ -2,3 +2,4 @@ selenium>=2.40.0
 mock>=1.0.1
 coverage
 nose
+tox

tox.ini

@@ -0,0 +1,8 @@
+[tox]
+envlist = py27
+
+[testenv]
+VIRTUAL_ENV={envdir}
+deps = -r{toxinidir}/requirements.txt
+       -r{toxinidir}/test-requirements.txt
+commands = nosetests {toxinidir}/mailpile/tests --with-coverage --cover-package=mailpile