Add support for build stages

.travis.yml

@@ -1,20 +1,26 @@
 language: python
+
 cache: pip
+
 python:
 - '2.7'
 - '3.4'
 - '3.5'
 - '3.6'
+
 install:
 - pip install .
 - pip install -r requirements-dev.txt
+
 script:
 - nosetests
-notifications:
-  email: false
-  slack:
-    secure: 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
-deploy:
+
+jobs:
+  include:
+  - stage: PyPI release
+    python: '3.6'
+    script: skip
+    deploy:
       provider: pypi
       user: Pr0Ger
       password:
@@ -22,4 +28,8 @@ deploy:
       distributions: sdist bdist_wheel
       on:
         tags: true
-    python: '3.6'
+
+notifications:
+  email: false
+  slack:
+    secure: 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