'Deleted' content & references

[mschermann]

Some of the references were preventing bookdown from compiling. Thus, I deleted them. You need to add them again in the correct format.

[mschermann]

Still missing:

pandoc-citeproc: reference info_viz not found pandoc-citeproc: reference data_journ not found pandoc-citeproc: reference intuitive-dash not found pandoc-citeproc: reference benefits_interactive_viz not found pandoc-citeproc: reference next_steps not found pandoc-citeproc: reference Immigration not found pandoc-citeproc: reference int_viz_2 not found pandoc-citeproc: reference population_pyramid not found pandoc-citeproc: reference syria_chart not found pandoc-citeproc: reference int_viz_2 not found pandoc-citeproc: reference oscars_sowhite_chart not found pandoc-citeproc: reference britain-diet-data-trends not found pandoc-citeproc: reference country_original not found pandoc-citeproc: reference interworks not found pandoc-citeproc: reference KDD99 not found pandoc-citeproc: reference data_meaning not found pandoc-citeproc: reference DataUSA not found pandoc-citeproc: reference CensusDataViz not found pandoc-citeproc: reference decept_study not found pandoc-citeproc: reference rose_tint not found pandoc-citeproc: reference mislead_graph_ex not found pandoc-citeproc: reference design_ebooks not found