v2.0.0 - Frequency and Voltage Graphs

What's Changed

• Added Frequency and Voltage data and graphs
• Changed data retention term to 25 years
• Update backup.sh to delete influxdb snapshots after backup is complete by @cwagz in #8 and #9
• pyPowerwall v0.4.0

New Contributors

• @cwagz made their first contribution in #8

Full Changelog: v1.0.0...v2.0.0