Remove default value for refresh option, fixes #22

The default value was making the refresh option have a value even if
the input option was omitted from the command. I believe this is a bug
in Symfony Command. I’ve removed the default value, and now the `-r`
option requires a value.
Build 2.0.5
Change template list to DirectoryIterator. Closes #24

The glob directory iterator is not compatible with the phar file. The
DirectoryIterator appears to be able to handle it in both dev mode and
deployed phar.
Release 2.0.6
Merge pull request #26 from there4/issue-24-template-list

Release 2.0.6: Issue 24 template list
Merge pull request #2 from there4/master

Merge changes from markdown-resume project into my forked version