Tutorial Screenshots Changed from PNGs to JPEGs

At no appreciable loss of quality, the screenshots on all my tutorials have been changed from PNG format to JPEG format. Since Weebly's (my website host) server can at times be a little slow, this was done to ensure screenshots load faster (especially if you open them full-size). The total screenshot filesize for some tutorials has dropped to under 1/3 of the original (the narrowband example tutorial dropped from 299MB to 86.4MB). The only tutorial that still uses PNG screenshots is my PixInsight pre-processing tutorial, which ironically goes up in total filesize on JPEG format.