Copy, paste, & basic markdown per HR Bookstrap.
Correct sub-bullet markdown.
Identity, first, and last working.
each & indexOf now working.
filter now working.
reject now working.
uniq now working.
map & pluck now working.
invoke now working.
reduce now working.
contains now working.
every now working.
some now working.
extend now working.
defaults & once now working.
memoize now working.
delay now working.
shuffle now working.
Comment old code.
Correct null vs undefined error in 'reduce'.