add easy use of utils/deps in chain-able classes

[aretecode]

methodchain

• [ ] memoize
• [ ] better transforms
• [ ] change compose which has the classes as properties not flat exports in index
• [ ] es6 export file
• [ ] tests for decorators in compose
• [ ] split methodchain into core, and then almost all method-builders could be added as plugin types
• [ ] pool method-builder rather than try & force garbage collection