initial implementation of uninstall. plus adding prompt and menu utilities
merging from dev0.3
adding install warning to setup.py for XCode 5.1 and above
adding helper prompt functions (maybe should be separate module?)
added generic helper function for prompting for option selection or yes/no
changing the yes/no prompt so that it can require exact match
changing the yes/no prompt so that it can require exact match. adding option to provide a question when prompting for menu select
creating remaining flow for the uninstall command.
enhancing documentation, preparing for pypi packagine