Update README.md
fix link to travis-ci builds
Merge pull request #30 from fivetanley/fix-travis-ci-link

fix link to travis-ci builds
remove screenshots, i keep clicking on them and expecting them to work.
Throw exception if no height or rowHeight is set
Merge pull request #32 from thomasboyt/property-assertions

Throw exception if no height or rowHeight is set
remove now-uneeded extra reuse
Only Native ListView needs to force scrollPosition
fixup demos
emit scrollingDidStart event
add small and large mobile image scroll list examples

They need lots of perf love still.
Remove extraneous helper from demo
Pushed context comparison into ListItemView, extracted ListItemViewMixin, and introduced Reusable ListItemView. @lukemelia/@stefanpenner

ReusableListItemView should be considered experimental. If you have the right use case, it can prevent rerenders in a massive way. Documentation will come soon.
Add tests to validate that views are not rerendered with ReusableListItem, and make ReusableListItem hide itself with display:none when there is no context to render. @lukemelia/@kagemusha
Clean up… separate ListItemViewMixin, ListItemView, ReusableListItemView. @lukemelia/@kagemusha
Rename the scrollContentTo event to scrollYChanged, and don't clamp it at zero, so it can be better used by scrollbars with overshoot compression @lukemelia/@kselden/@kagemusha
make prepareForReuse a hook