moved assets to correct place

src/src/assets/data/lectures.json

src/src/assets/sponsoren/Celanese_web_neu.png

src/src/assets/sponsoren/WebHicForFair.png

src/src/assets/sponsoren/Web__FIAS.png

src/src/assets/sponsoren/biotest.png

src/src/assets/sponsoren/facebook.png

src/src/assets/sponsoren/freunde_mpibr.png

src/src/assets/sponsoren/freundeundfoerderer.png

src/src/assets/sponsoren/goetheuniversitaet.png

src/src/assets/sponsoren/heraeus.png

src/src/assets/sponsoren/hessen-schafft-wissen.png

src/src/assets/sponsoren/hrz.png

src/src/assets/sponsoren/hsw_logo_s.png

src/src/assets/sponsoren/merz.png

src/src/assets/sponsoren/mpibp.png

src/src/assets/sponsoren/mpibr.png

src/src/assets/sponsoren/oswaltstiftung.png

src/src/assets/sponsoren/rockwood-lithium.png

src/src/assets/sponsoren/twitter.png

src/src/assets/sponsoren/youniq.png