First attempt at handling pressure data. Other changes involve simplifying the datatypes.
Fixing the stroke with by introducing a dependency of the offset for the outset of the direction of the line.
Added a simple mechanism to skip points that are double.
Added a simple despiking filter. The SPIKE_THRESHOLD is arbitrary set to 20 of what ever units.
Merge pull request #5 from MeraX/master

Fix of stroke width an simple despiking by MeraX