Remove unused module -> Enbld/Copy
Refactor definition 'Hello'.

Attribute 'CommandConfigure', 'CommandMake', 'CommandTest', 'CommandInstall' returns default value for match GNU software.
Refactor definition 'zsh'
Refactor definition 'wget'
Refactor definition 'tmux'
Fix scala's website.
Refactor definition 'ruby'
Add CommandTest to definition 'rakudo-star'
Refactor definition 'pkgconfig'
Refactor definitin 'perl'
Refactor definition 'pcre'
Refactor definitions
Fix unnecessary command pattern.
Add perldoc for utility commands.
Fix typo.
Add perldoc for definition modules.
Refactor definition for 'tmux'
Fix fail test.
Move xt/ -> t/
Fix fail test.