Iris Calliope

snp_browser.m: minor bugfix
pm_info.m: minor changes
existin.m: new function, analogous to 'assignin' and 'evalin'
help.txt: minor change / 2x new functions added

mostly cosmetic changes

parse_ach.m: minor change
randi_spaced.m: added
spider_plot_R2019b.m: cosmetic change

query ach, ini and metainfo files with a snap of the finger

shortcut to display information about currently loaded metafile. also the name is catchy!

minor: case sensitivity bugfix

bugfix: attempt to load 2nd channel if data is classified as 2pi and ensure exp_type variable is always defined

bugfix