Updating README with an example

Updating README

Updating README
Clearing `DataStore.views` from `DataStore.setComplete()`, updating all `DataList.refresh()` calls to not clear cached views
Adding SASS & CSS files for a default grid

Updating CHANGELOG

Minor tweaks to SASS file
Adding a `placeholder` attribute to the optional `DataListFilter` instantiated from a `DataGrid`

Updating CHANGELOG
Merge pull request #9 from avoidwork/edge

Minor changes