v2.1.5

• Standard time-series handling added - each column needs a gauge, followed by and underscore, followed by either flow or level (e.g. 409025_flow). This handling also has missing date filling - so any missing dates will be filled with NaN values in all columns.
• ten thousand year handling - the same formatting as above is required (gauge_flow OR gauge_level)
• bug fixes: spells of length equal to the minimum required spell length were getting filtered out of the successful events table and successful interevents table.
• Updating github actions