Little overlap of support lines from two objects are allowed.
Change-Id: I738874ee71fc9787abbef764dbad762c76bc5731
(cherry picked from commit a5f7a53dc818d598523149d675fd0310f5d22f86)
1. add gcode conflict checker
2. add a new command line option: --no_check. When it's provided, gcode
conflict check is skipped.
Change-Id: I6feafca8c5fa6c3c5eae1f0e541ce59d2f03dedf
(cherry picked from commit 5a39afb64e826a960d9673dcada89d02d62b3911)