Write directories in lowercase.
    
    - Previously, directories were written with the first letter in
      upper-case. Once tcar_setModuleEnvironment changed to read module
      files from lowercase directories, the tuneup module didn't work.
      This update changes tcar-scripts-tuneup directories from being
      written with the first letter in upper-case to all letters in
      lowercase so tcar_setModuleEnvironment can read them.