Update CI configurations to handle Boost dependency

.travis.yml

@@ -12,11 +12,13 @@ addons:
       - libsundials-serial-dev
       - liblapack-dev
       - libblas-dev
+      - libboost-dev
 before_script: |
   pip install --user --install-option="--no-cython-compile" cython
   if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
       brew update
       brew install scons
+      brew install boost
   fi
   rm -f cantera.conf
 script:

appveyor.yml

@@ -6,7 +6,7 @@ install:
     C:\Python27-x64\Scripts\pip.exe install cython
 
 build_script:
-- cmd: C:\Python27-x64\scons build
+- cmd: C:\Python27-x64\scons build boost_inc_dir=C:\Libraries\boost_1_62_0
 
 test_script:
 - ps: |