fix chapter 3 and add chapter 5

public/05-mapping_with_r_files/figure-html/discr3-1.png

public/05-mapping_with_r_files/figure-html/dorling-1.png

public/05-mapping_with_r_files/figure-html/dougenik-1.png

public/05-mapping_with_r_files/figure-html/inset-1.png

public/05-mapping_with_r_files/figure-html/labs-1.png

public/05-mapping_with_r_files/figure-html/layout1-1.png

public/05-mapping_with_r_files/figure-html/linemap-1.png

public/05-mapping_with_r_files/figure-html/logo-1.png

public/05-mapping_with_r_files/figure-html/mf_base-1.png

public/05-mapping_with_r_files/figure-html/mfrow0-1.png

public/05-mapping_with_r_files/figure-html/north-1.png

public/05-mapping_with_r_files/figure-html/olson-1.png

public/05-mapping_with_r_files/figure-html/pal1-1.png

public/05-mapping_with_r_files/figure-html/pal2-1.png

...pping_with_r_files/figure-html/proportional_symbols-1.png

..._with_r_files/figure-html/proportional_symbols_comp-1.png

public/05-mapping_with_r_files/figure-html/scale-1.png

public/05-mapping_with_r_files/figure-html/shadow-1.png

public/05-mapping_with_r_files/figure-html/tanaka-1.png

public/05-mapping_with_r_files/figure-html/them1-1.png