0.3.0

This release is up on CRAN as version 0.3.0

Changes:

• Upgrades to PivotTable.js 2.19.0 from 2.11.0, fixing #85, #83, #79
• Adds Subtotal.js 1.10.0 via the new subtotals flag (fixes #74)
• Fixes localization (#73) and adds the new locale flag directly in rpivotTable()