Use common response key instead of UK specific keys
add stackedbar visualization for OpenSpending
added to readme
Merge pull request #61 from mihi-tr/stackedbar

Stackedbar
Version 0.4.0

A new visualisation in openspendingjs: stacked bar charts
Merge pull request #53 from jmblog/untie-from-gb-taxman

Use common response key instead of UK specific ones