Merge branch 'Neotron-Compute:develop' into develop

Some clarifications in the instructions.

Merge pull request #156 from Detegr/assembly

assembly: add information for installing target The Rust toolchain does have a good error message about this if the target is not installed, but it doesn't hurt to have it in the instructions too.

assembly: drop .elf extension from bmc file name The BMC release does not have .elf extension in the file name.

Merge pull request #155 from pferreir/improve-assembly-guide

Add component references to soldering instructions Also clarify some of the details

Merge pull request #153 from erkinalp/patch-1 Passive cooling and low power

Passive cooling and low power

Merge pull request #151 from Neotron-Compute/doc_updates Add an assembly manual (of sorts)