defaults:
defaults:

 - change the order of defaults (although not being used right now)
 - add `.md` to extensions of default engine

avr/assemble,edrohler/assemble,makotot/assemble,xetryj/assemble,xetryj/assemble,cgvarela/assemble,edrohler/assemble,cgvarela/assemble,assemble/assemble,assemble/assemble