Split Builder -> {Packer, Builder}
Simplify by splitting files.into() -> {files.rename(), file.into()}
Move Files() into a separate file
Code format preference (minor)
Move JqueryUiFiles into a separate file
Handle each version specifics in a separate file

- JqueryUiFiles_<version> inherit from JqueryUiFiles;
Update banner on minification
Separate Cache manager from ThemeRoller Image
Cache Builder
Workaround to keep jquery ui's generate_theme working
Read @VERSION-replaced data. Reading the file directly gets @VERSION variable instead (fix).