[CI] Add Python 3 to build

.travis.yml

@@ -8,6 +8,10 @@ addons:
     packages:
       - python-dev
       - python-numpy
+      - python-pip
+      - python3-dev
+      - python3-numpy
+      - python3-setuptools
       - gfortran
       - libsundials-serial-dev
       - liblapack-dev
@@ -20,9 +24,10 @@ before_script: |
       brew update
       brew install scons
       brew install boost
+      brew install python3
+      pip3 install numpy
   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
+  - scons build -j2 VERBOSE=y python_package=full python3_package=y blas_lapack_libs=lapack,blas optimize=n
   - scons test

appveyor.yml

@@ -7,9 +7,10 @@ install:
     C:\Python27-x64\Scripts\pip.exe install cython
     C:\Python27-x64\Scripts\pip.exe install 3to2
     C:\Python27-x64\Scripts\pip.exe install pypiwin32
+    C:\Python35-x64\Scripts\pip.exe install numpy
 
 build_script:
-- cmd: C:\Python27-x64\scons build -j2 boost_inc_dir=C:\Libraries\boost_1_62_0 debug=n VERBOSE=y
+- cmd: C:\Python27-x64\scons build -j2 boost_inc_dir=C:\Libraries\boost_1_62_0 debug=n VERBOSE=y python3_cmd=C:\Python35-x64\python.exe
 
 test_script:
 - ps: |