updated changelog with #345 stuff, fixed some 100char overrun stuff from the items above too...
removed faulty repo ACS CF iamge file lcoation, moved to a more real.py user-input way of specifying the lcoation of acs_I_unrot_sci_20_cf.fits
(#345)
noticed a couple of locations which could use inline code quotes for clarity in real.py, added them
(#345)