Add Register Machine Assembler for BrainFuck

[kamil-adam]

Simple Register Assembler for BrainfFuck:

• https://github.com/helvm/brainfuck-compiler/tree/master/language-registermachine
• https://gergo.erdi.hu/blog/2010-09-06-from_register_machines_to_brainfuck,_part_1/
• https://gergo.erdi.hu/blog/2010-09-07-from_register_machines_to_brainfuck,_part_2/