Remove references to scipy from travis config and setup.py

.travis.yml

@@ -7,7 +7,7 @@ python:
 
 # command to install dependencies
 install:
-  - "pip install --only-binary=scipy -r requirements.txt"
+  - "pip install -r requirements.txt"
   - "pip install -r test-requirements.txt"
   - "pip install coveralls"
 

setup.py

@@ -39,7 +39,7 @@ METADATA = {
 }
 
 SETUPTOOLS_METADATA = {
-    'install_requires': ['cairocffi==0.6', 'scipy'],
+    'install_requires': ['cairocffi==0.6'],
 }