xml to yaml converter

[mlee03]

Is your feature request related to a problem? Please describe.
The users will soon be urged to transition from bronx fre make to fre-cli fre make.
A xml to yaml converter would facilitate this process.

Describe the solution you'd like
A simple script to convert the compile and platform sections of xml to compile yaml and platform yaml.

Describe alternatives you've considered
Do not provide a converter

[mlee03]

@ceblanton @singhd789, as discussed :)

[ceblanton]

Thanks! I'm sure that a fre yamltools convert will be a useful aide for generally converting configurations for users. We could use it at first to convert Bronx compile XMLs, and expand it to runtime XMLs, postprocessing XMLs, and in the more distant future, converting from old YAML formats to new YAML formats.

[singhd789]

Thank you!!