first cut
combine all metrics into one call
utilize the actual metric timestamp
ignore empty values instead of initializing to zero
change period
naming
allow begin and end offset to be specified on the command line
allow multiple ELBs to be passed in
allow period offset to be overridden
handle multiple metrics when called with a period larger than 60 seconds
executable
missing conversion on args
Merge pull request #4 from tacchino/master

Dynamo