BLD: Add scipy to test requirements.

For example scripts. Though compiling scipy for TravisCI may be the
straw that breaks the camel's back as far as total suite run time.

.travis.yml

@@ -7,6 +7,7 @@ before_install:
   - pushd ta-lib; ./configure; make; sudo make install; popd
   - sudo apt-get install gfortran
 install:
+  - pip install scipy==0.12.0
   - cat etc/requirements_dev.txt  | grep -v "^#" | grep -v "^$" | grep -v ipython | grep -v nose== | xargs pip install --use-mirrors
   - etc/ordered_pip.sh etc/requirements.txt
 before_script:

etc/requirements_dev.txt

@@ -15,6 +15,7 @@ pyandoc==0.0.1
 
 # Example scripts that are run during unit tests use the following:
 
+scipy==0.12.0
 matplotlib==1.2.1
 statsmodels==0.4.3
 patsy==0.1.0