v0.3.2 - Added export interfaces, simplified requirements

The requirements for this version of the toolkit are far less stringent because we have dropped the scythe-extractors requirement.

What's Changed

• Add methods for computing cycle times by @WardLT in #68
• Updating battery descriptions by @victorventuri in #72
• Introduce a base class, barebones exporter by @WardLT in #78
• Remove scythe dependency by @WardLT in #79
• Store schema with metadata by @WardLT in #80

Full Changelog: v0.3.1...v0.3.2