added new helper class for 3x3 matrices and vec3
added magnetometer data
added compass detection
refactored pose-estimation (single class)
refactored debug plots (move to own class)
minor changes
- worked on about everything
- grid walker using plugable modules
- wifi models
- new distributions
- worked on geometric data-structures
- added typesafe timestamps
- worked on grid-building
- added sensor-classes
- added sensor analysis (step-detection, turn-detection)
- offline data reader
- many test-cases