added a AggregateMetricForm
added tests for AggregateFormView
added AggregateFormView and (a skeleton) for AggregateDetailView -- ways to view metrics in aggregate
R.get_metrics now returns a list of tuples instead of dicts
sometimes random is good
fleshed out aggregate metric details
pep8
gauges are now ... gauges in the sample template
get_metric_history now works with multiple slugs
really randomize data
added a get_metric_history_as_columns method returning metrics history in a columnar format
added a metric_slug template tag
added views for aggregate history of metrics
added a default value for graphs in aggreate_detail template