update to cdt 1.6, holds one minute of data instead of last n points

[ghost]

1. updated to cdt 1.6
2. when data is fed by any given BP, it trims any data points older than one-minute, instead of trimming to n number of data points.
3. scale in the updater.js is changed from 10000 to 1000000 because for example IQ is 0.000727 EOS per IQ
4. TODO, add two extended assets to the pair table.....updater.js should pass two extended assets (base and quote) along with the simple name (i.e. eosusd), and the write action should verify that those assets match the pair table corresponding to that simple name.
5. TODO, confgure action should take arguments to add a pair, currently it is hard coded.