CL-260 conversion to Ultimaker 2+ Clone

I bought the CL-260 and decided to go one step further and replace all the necessary parts to get something as close to the UM2+.

What has been done on hardware:
* Switched electronics from MKS Board to UM2 Mainboard and Controllerboard
* Switched to 24V to match UM2 electronics
* Switched thermal sensors to PT100
* Switched Extruder to E3D clone as the "original" one was very poor
* Switched heated bed to work with 24V
* Added some 24V LED stripe
* Integrated 24V@20A power supply
* Z-endstop moved from top to bottom to match UM2 behavior
* Switched extruder linear bearings to 6 mm high precision bearings
* Switched fans to 24V versions
* Replaced Z rods and bearings with high precision components
* Improved spool holder
* Changed print bed to UM2+ bed
* Replced feeder with geared UM2+ feeder (1.75 mm version)

What has been done in software:
* Adapted UM2 firmware to match new configuration https://github.com/siredmar/Ultimaker2Marlin
* Modified UM2+ FFF profile