Allow ":" and "-" characters in phing tasks.
Allow ":" and "-" characters in phing tasks.

Tasks that included hyphens or colons were being excluded from
completion.  This improves the usage for this.

larrylv/oh-my-zsh,larrylv/oh-my-zsh,larrylv/oh-my-zsh,larrylv/oh-my-zsh