Create initial implementation

[fh1ch]

BACNET layer implementation

• [x] Service (~~15% done~~ ~~40% done~~ 100% done)
• [x] ASN1 (~~80% done~~ ~~90% done~~ 100% done)
• [x] APDU
• [x] NPDU
• [x] BVLC

BACNET functionaility implementation

• [x] WhoIs
• [x] ReadProperty
• [x] WriteProperty
• [x] ReadPropertyMultiple
• [x] WritePropertyMultiple
• [x] Segmentation
• [x] Time Sync

Project Setup

• [x] Fix linting issues
• [x] Implement unit tests
• [x] Implement integration tests
• [x] Implement abort, error and global error-handling (~~implement~~, ~~test~~)
• [x] Adapt internal function and variable naming
• [x] Fix Codeclimate issues
• [x] Rework interface / API

Postponed

• [x] ES6 rework
• [ ] Add compliance tests and extend to all official functions
• [ ] Rework project structure (e.g. split BACNET layers into separate smaller files - Services & ASN1)
• [ ] Rework decoding architecture to reduce redundant code
• [x] Tidy up enum according to latest standard
• [ ] Fix compliance test findings
• [ ] Add missing function usage documentation
• [ ] Improve debug loggs
• [x] Add ASHRE disclaimer
• [x] Add FAQ file
• [x] Drop experimental notice
• [ ] Add notice to report issues with decoding
• [ ] Add exception handling