Pluckit

7ad4f70 relax constraints around handling None, as both input and handles...pluck it
22ad2cd expand corner case coverage
a65be24 more test cases
a386e3b remove Pluckable from standard import

3b3132e improve native install
d461169 create mechanism to install pluck on native types
304f284 handle multi-handle set plucks
787773f break out pluckable and mixin tests, expand coverage
62a68ac break up functionality better
300d4af humanize data
c3eeb61 improved list like handling
10c1abe Update README.md

1062bd9 type check
e517d98 gc
e49973f cleanup
56ae772 reorg
81d289b more efficient cloning...only when necessary
e5bf1a7 facilitate Pluackable list/dict/set
2cc3070 cleanup