Merge pull request #16 from Swatinem/master

give index for 'add' and 'remove' events, fixes #15
updated dependency
update to-function to temporarily use getter/fn branch so we can support getter fn attribute models
update emitter to 1.1.0
update readme example with more awesomeness
updated dist
added array mixin support and added array#lastIndexOf(n).
mixin docs
added mixin test
Release 0.3.0
update index in remove event when splicing multiple items
Release 0.3.1
remake array to conserve context. fixed unique()
Release 0.3.2
npm install array.js => array. thanks to @enricomarino :-)
added custom .get(obj) mapping. internal remake no longer modified original context. added unique(fn|str)
add more tests
update tests
Release 0.4.0
update dist