[CI] Add 3to2 and VERBOSE options

.travis.yml

@@ -15,11 +15,13 @@ addons:
       - libboost-dev
 before_script: |
   pip install --user --install-option="--no-cython-compile" cython
+  pip install --user 3to2
   if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
       brew update
       brew install scons
       brew install boost
   fi
+  export PATH=$HOME/.local/bin:$PATH
   rm -f cantera.conf
 script:
   - scons build -j2 VERBOSE=y python_package=full python3_package=n blas_lapack_libs=lapack,blas optimize=n

appveyor.yml

@@ -5,9 +5,10 @@ install:
     C:\Python27-x64\Scripts\pip.exe install --egg scons
     C:\Python27-x64\Scripts\pip.exe install numpy
     C:\Python27-x64\Scripts\pip.exe install cython
+    C:\Python27-x64\Scripts\pip.exe install 3to2
 
 build_script:
-- cmd: C:\Python27-x64\scons build -j2 boost_inc_dir=C:\Libraries\boost_1_62_0 debug=n
+- cmd: C:\Python27-x64\scons build -j2 boost_inc_dir=C:\Libraries\boost_1_62_0 debug=n VERBOSE=y
 
 test_script:
 - ps: |