Platform may need to calibrate due to various first layer height in different start gcode

Malyan mod of Cura can be download here.

1. MacOSX version: http://www.malyansys.com/downloads/Cura150602-malyan-mac.zip

2. Windows Version: http://www.malyansys.com/downloads/Cura150602-malyan-win.exe

Modifications:

1. Add M180 Machine support.

2. Allow save to X3G file.