added sudo to pymysql pip install

Author: valentinedwv

.travis.yml

@@ -47,7 +47,7 @@ before_install:
 # python -m pip makes the install go into the virtualenv
   - sudo pip install --upgrade pip
   - sudo python -m pip install pandas
-  - export PYMSSQL_BUILD_WITH_BUNDLED_FREETDS=1;python -m  pip install pymssql
+  - export PYMSSQL_BUILD_WITH_BUNDLED_FREETDS=1;sudo python -m  pip install pymssql
 #  - python -m  pip install mysql-python
 install: # now just our code
   - pip install -e git+https://github.com/ODM2/geoalchemy.git@v0.7.4#egg=geoalchemy-0.7.4