Implemented to write test result summary to a txt file.
Use fs-extra instead of fs
Write out to path set in generator config file, and only if path is set; delay completion until writing the results log is complete
Added autorun configuration
Document the autorun config option
Fixed grunt error
Merge branch 'kaori/psf' of https://github.com/adobe-photoshop/generator-assets-automation into kaori/psf
Merge pull request #14 from adobe-photoshop/kaori/psf

Implemented to write test result summary to a txt file.