simplified some conditionals, deleted unused/commented code, standardised spacing a bit
removed redundant function wrapping
bugfix due to missing a data.data reference
simplified slideBackgroundPhoto
simplified numberbutton stuff
reorganised code; variables -> functions -> onload
refactor checkin - near feature equal (need to preload images & handle error load cases better & show subreddit name)
added image preloading & made the datasource describe its source
refactor checkin, cleared out any gif specific stuff again due to unreliability
spruced up the commenting
added regex update, guess I nuked it in a merge :(