Remove min*/max* from GCodeAnalyzer

We also drop G162 (home to max endstops) support, but it sounds like
nobody ever heard about it and everyone is using *_HOME_DIR instead.
Start merging GCoder with GCodeAnalyzer
Fix wrong code block indent in GCodeAnalyzer
Remove imperial/relative parsing in GCodeAnalyzer (use GCoder)
Cleanup
Fix obvious typo in GCodeAnalyzer
Remove last* from GCodeAnalyzer as they are never used elsewhere
More work towards the merging of GCodeAnalyzer and GCoder