Update CentOS-6.3-x86_64-cfntools.tdl

fixed missing <command> tag and added name attributes to command tags.
Updating CentOS version to reflect latest release. Kept original.
Creating new versions for Fedora 19 and 20.
Merge pull request #50 from jfarcher/master

Update CentOS-6.3-x86_64-cfntools.tdl