Add documentation to GCoder about coordinate systems (#444)
Correctly save current position in _preprocess_lines
Handle E offsets correctly in GCoder
Only emit a warning for unknown configuration variables
Move build_dimensions setting to pronsole
Add home position handling to GCoder
Pass home position go gcoder.GCode instances
Add abs_* properties to GCoder
Document the abs_* properties
Cleanup
Make a property for home_pos in GCoder
Allow creating a GCode object without any argument
Store current feedrate in GCoder
Replace GCodeAnalyzer by GCoder in printcore
Set home_pos from pronsole and factorize build_dimensions handling
Document build dimensions option (#391, #443, #444)