add slide about access method returning single element vs nodelist
change variable name for consistency with previous slide
Merge pull request #120 from pamelafox/brenda

#119 edited names in script to 'frontend' and 'backend'
replace nodelist with array in new dom selection slide
resolve merge conflict
Merge pull request #78 from ahoefinger/js200_dom_nodelist_slide

additional slide in jsweb dom.html
Changing video to otters
Merge branch 'master' of github.com:pamelafox/teaching-materials
added venn diagram to illustrate inheritance
added extra bonus fun
Merge pull request #125 from brendajin/master

added venn diagram to illustrate inheritance
updated jsoo image based on feedback from @pamelafox