add instance summary placeholder
add volume summary placeholder to dashboard
put summaries in summary list component
add provider summaries
add more details to provider summaries
remove old provider summary table
add placeholder for instance history
show instance history start/end dates
style instance history to match image version style
fix history sort order
group instances based on status
group volumes based on status
prevent instance store from fetching shutoff instances
style dashboard header
add maintenance message store, model and collection
display maintenance messages on dashboard
Merge pull request #39 from iPlantCollaborativeOpenSource/style-dashboard

Style dashboard