Letsdo

Point-release to fix some problems with the configuration files

What's Changed
* Fix goto CLI handler by clobrano in https://github.com/clobrano/letsdo/pull/50
* Do not use old Configuration object by clobrano in https://github.com/clobrano/letsdo/pull/51


**Full Changelog**: https://github.com/clobrano/letsdo/compare/2.0.0...2.0.1

Starting from v2.0.0, Letsdo has this configuration changes:

* the configuration file name changes from $HOME/.letsdo to $HOME/.letsdo.yaml
*the data file name changes from <data_directory>/letsdo-data to <data_directory>/letsdo-history

If you have old data and configuration, just change the names accordingly and all will work as before.

**Full Changelog**: https://github.com/clobrano/letsdo/commits/0.7.3