updated readme.md
moved and renamed all zfigs from Pablo using BB code:

from ohimanual/make.r
setwd('~/github/ohimanual/tutorials/fig')
for (f in list.files(getwd(), glob2rx('zfig_*'))){
  file.rename(f, str_replace(f, 'zfig_',''))
}
redid all zfig paths using BB code make.r:

Also, deleted toolbox_manual folder

make.r:
for (f in list.files(getwd(), glob2rx('*.md'))){

  s = readLines(f, warn=F, encoding='UTF-8')
  s = str_replace_all(s, fixed('](zfig_'), fixed('(./fig/'))
  writeLines(s, f)

}