added yamlmatlab to repo
added basic settings yaml file
added settings parser class
replaced hardcoded sample_rate
removed hardcoded text file extension
Merge branch 'dev' into gui_dev
added settings file functionality to gui
simplified settings access in assembler
WARNING: added signal columns from file PARTIAL

doesn't handle when signal column doesn't exist yet
added check to see if valid data in subprocesses
SAFE: complete read columns from file with 'none'
Merge branch 'dev' into gui_dev
modified gui for compatibility w/ processes changes
'none' is now the not-used column identifier