Smaller fixes
Removes individual homing of x,y,z from LCD menu when printer is delta where it isn't used.
Merge pull request #77 from Halopend/temp

Remove individual X,Y,Z homing from delta printers
Adde missing OPSMoveAfter initalization, added board 21 gen3 PLUS
Compilation bugfix for I2C beeper

Software does not compile when you define a beeper connect through I2C.
Merge pull request #80 from Jerome-PS/patch-1

Compilation bugfix for I2C beeper
Added Melzi board, bug fixes
i3 Rumba config
Merge branch 'master' of https://github.com/repetier/Repetier-Firmware