TODO
====

Implement
---------

* [x] File decryption to temp path
* [x] File re-encryption
* [ ] Comment all functions
* [X] Read environment variable $EDITOR, default to vim (only parse arg 0 to
      some avoid security concerns)
* [ ] Argument parser (eg: -r,--recipient)
* [x] Recipient addition beyond the list already in the file
* [ ] Recipient removal from existing file
* [x] New file creation (at least one recipient required)
* [x] Helptext
* [x] Basic logging framework (to support debug, quiet, silent modes)