inserted INEL help content and images

images/bib-search.png

images/catalogue-columns-display.png

images/catalogue-export.png

images/catalogue-graph-basic.png

images/catalogue-graph-browse.png

images/catalogue-search.png

images/hzsk-repository-corpus-box.png

images/hzsk-repository-corpus-sessions.png

images/hzsk-repository-corpus-tabs.png

images/hzsk-repository-disco-juice.png

images/login-button.png

index.html

js/custom.js