Modular approach for exporting different format

Hi, I did a little bit refactoring to allow easy addition of more
formats for export. the export options can now be moved to another place
easily if needed.
newline at the end of file
Merge branch 'master' of https://github.com/vikramsoni2/resume-cli into mod
Merge branch 'master' of https://github.com/vikramsoni2/resume-cli
Merge branch 'mod'