Scratchwork on spherical arc functions
Started conversion to arc
Working SLERP and spherical arcs
Miscellaneous refactoring to add cases
Simplified code in tcGetPosReal for readability
Removed old circle-based blend arc functions
Merge branch 'feature/spherical-arc' into circular-blend-arc-experimental
Added extra test file
Estimate minimum segment length of next line based on d_prev
Added length bound on blend arcs for previous parabolic blends
Tighter tolerances on some constants
Merge branch 'feature/blend-length-limits' into circular-blend-arc-experimental
Move TP files to their own folder

Also updates Makefile and Submakefile to find headers and link
appropriate objects
Working planar acceleration bound
Small optimization and comments
Skip planar accel when accelerations are equal
Merge branch 'feature/planar-acc-bound' into circular-blend-arc-experimental
Added naive CAM test files