Merge branch 'dev_2' into dev

Conflicts:
README.md
gcode.c
motion_control.c
planner.c
planner.h
protocol.c
report.c
settings.c
settings.h
stepper.c
stepper.h

protocol.h

@@ -30,7 +30,7 @@
 // memory space we can invest into here or we re-write the g-code parser not to have his 
 // buffer.
 #ifndef LINE_BUFFER_SIZE
-  #define LINE_BUFFER_SIZE 50
+  #define LINE_BUFFER_SIZE 70
 #endif
 
 // Initialize the serial protocol