CLI meshes.parameters.file needs relative path

[Chrismarsh]

./CHM -f ~/chm/build/bin/Release/benchmark/granger_config.json -c meshes.parameters.file:~/chm/build/bin/Release/benchmark/granger1m_0.25hc.param -c option.startdate:"20001001T000000" -c option.enddate:"20010501T000000"

Gives Unable to open /home/wguo/chm/build/bin/Release/benchmark/~/chm/build/bin/Release/benchmark/granger1m_0.25hc.param

./CHM -f ~/chm/build/bin/Release/benchmark/granger_config.json -c meshes.parameters.file:granger1m_0.25hc.param -c option.startdate:"20001001T000000" -c option.enddate:"20010501T000000"

resolves this issue