Adding hasCommand utility method and changing isWindows() to use running system, not build system identifier.
Moving duplicated command_exists() to Util.php and renaming to hasCommand()
tv/music regex additions
Fixing trailing white-space introduced into group-list.tpl files after merging from upstream
Fixing trailing white-space someone introduced to group-list.tpl  Who's not using the pre-commit hook? ;-)
fixed typo in schema
Fixing constants in install/step1
Changing button text for install/step6.
Merge pull request #405 from nZEDb/dev

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