Quick fix: Don't run out of memory trying to spool the huge new report
Work around broken detailed line items record for spot instances

(UnBlendedRate should be a numeric field but is "")
New CSV importer which uses COPY (and is therefore many times faster)
Merge branch 'csv-copy'

Conflicts:
	lib/koseki/aws_bill_line_item.rb
Explicitly cast hstore array (so it works with an empty one)
Fix array type
Drop temporary table explicitly

I would like to use ON COMMIT DROP but it doesn't seem to be modeled in
Sequel?
Remove debug code
Fix drop_table call
Remove more debug/dead code
Use streams instead of strings
More streams
Restore new_records count
Fix new_records harder
Restore logging in import_csv
round records_per_second
https rubygems
Refactor file handling, avoid downloading from S3 unless data is stale
Clarify variable names
Remove lying comment