Major highlights for this release:

All around performance improvements
Widgets are now collapsable
You can now use React templates
You can override the default search being done (= conditionally choose when to do a search)
Many small but annoying bug fixes

1.3.0 (2016-03-04)

browser support: make IE lte 10 work by fixing Object.getPrototypeOf (bbb264b
menu,refinementList: sort by count AND name to avoid reorders on refine (02fe7bf, closes #65
priceRanges: pass the bound refine to the form (ce2b956
searchBox: handle external updates of the query (6a0af14, closes #803
searchBox: stop setting the query twice (91270b2
searchBox: stop updating query at eachkeystroke with searchOnEnterKeyPressOnly (28dc4d2, closes #875
Slider: do not render Slider when range.min === range.max (f20274e
Template: now render() when templateKey changes (8906224
toggle: pass isRefined to toggleRefinement (8ac494e
url-sync: always decode incoming query string (bea38e3, closes #848
url-sync: handle href pages (e58aadc, closes #790

collapsable widgets: add collapsable and collapsed option (c4df7c5
instantsearch: allow overriding the helper.search function (9a930e7
rangeSlider: allow passing min and max values (409295c, closes #858
searchBox: allow to pass a queryHook (5786a64
Template: allow template functions to return a React element (748077d
Template: allow template functions to return a React element (0f9296d

autoHideContainer: stop re-creating React components (8c89862
formatting numbers: stop using a default locale, use the system one (b056554
nouislider: upgrade nouislider, shaves some more ms (fefbe65
React: use babel optimisation option for React (95f940c
React, widgets: implement shouldComponentUpdate, reduce bind (5efaac1

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