Add Arduino Library Manager support starting with V0.3.x (Issue #5)

• Polish ino example (spelling, coding style ...)
• No functional changes for CFSM itself.

What's Changed

• V3.0 Arduino library support by @nhjschulz in #6

• Added library.properties and example ino file needed for Arduino Library Manager
• Spelling fixes in comments
• No functional changes

What's Changed

• CFSM: Add PlatformIO library json
• Reduced memory footprint
• Maturity level reached production use

What's Changed

• Prepare for Doxygen by @nhjschulz in #2
• CFSM: resolves #1 Add user instance data by @nhjschulz in #3

Full Changelog: v0.1.0-alpha...v0.1.1-beta

CFSM with minimal API

Full Changelog: https://github.com/nhjschulz/cfsm/commits/v0.1.0-alpha