Travis builds from a detached head.
We need to use the current branch so that versioning works properly

n_samples is an uint8_t .
Got printouts like:
50 of 2  ...

Gleaned from
https://github.com/MarlinFirmware/Marlin/commit/4ac14a7e5fa8e6e395436664
8976eafd1ae220ae

at least the lcd independent part from Marlin_main.cpp.

to MELZI_MAKR3D.

Fix for #2288
As the normal MELZI also can have a 1284.

ZigZag has been disabled by fault due to do_topography_map

Also clean up some trailing spaces in a few other sources