TemperatureControlPool: fix off-by-one in pool_index
Module: remove unused kernel pointer, shrink every Module instance by 4 bytes
Don't chain header includes if we don't have to, use predeclaration if we only need pointers. Include necessary headers from implementation rather than declaration.
Robot: remove current_position as it's substantially similar to last_milestone and can be completely replaced by this slight rework of append_line()
Kossel: forward kinematics implementation. Added Vector3 class to handle vector math, eg bed autolevel transform
Vector3: C++ification. Apparently showing my roots as a C programmer.
enabled inversion of PWM pin within Laser Module
Fix switch module to parse input and output commands properly
Merge pull request #324 from wolfmanjm/fix/switch

Fix switch module to parse input and output commands properly
Add Makefile magic to exclude specified modules

Conflicts:

	makefile
Merge pull request #327 from wolfmanjm/upstreamedge

Add Makefile magic to exclude specified modules
Robot: forgot to check Z axis during segmentation. Reported by merkurk2k, found by wolfmanjm
Robot: add a comment to clarify segmentation