[Input] Add ck2yaml script for converting Chemkin files to YAML

.travis.yml

@@ -36,10 +36,12 @@ before_script: |
   echo TRAVIS_OS_NAME: $TRAVIS_OS_NAME
   if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
       pip3 install numpy cython  # Install numpy and Cython for Python 3
+      pip3 install ruamel.yaml
   else
       pip3 install --user --upgrade pip
       pip3 install --user --upgrade setuptools wheel
       pip3 install --user cython
+      pip3 install --user ruamel.yaml==0.15.94  # Need a version compatible with Python 3.4
 
       # Install packages for the documentation
       pip3 install --user sphinx sphinxcontrib-matlabdomain sphinxcontrib-doxylink

appveyor.yml

@@ -8,6 +8,7 @@ install:
     C:\Python37-x64\Scripts\pip.exe install --no-cache-dir --no-warn-script-location numpy
     C:\Python37-x64\Scripts\pip.exe install --no-warn-script-location cython
     C:\Python37-x64\Scripts\pip.exe install pypiwin32
+    C:\Python37-x64\Scripts\pip.exe install ruamel.yaml
 
 build_script:
 - cmd: C:\Python37-x64\Scripts\scons build -j2 boost_inc_dir=C:\Libraries\boost_1_62_0 debug=n VERBOSE=y python_package=full