Added a CentOS 6.6 template to works_in_progress.
Correct the ZSH tarball URLs. The incorrect URLs had zsh-5.0.6 as the directory for the zsh-5.0.7.tar.gz tarball:

http://sourceforge.net/projects/zsh/files/zsh/5.0.7/zsh-5.0.7.tar.gz

The correct URL has zsh-5.0.7 as the folder for the tarball:

http://sourceforge.net/projects/zsh/files/zsh/5.0.7/zsh-5.0.7.tar.gz