Fixed fake readline

The readline that was implemented before would use "lispy> " regardless of the specified prompt.
Updated info on editline history header for mac
Merge pull request #17 from mrshu/patch-1

Fixed fake readline
Double pointer type has been seen before
Merge branch 'master' of github.com:orangeduck/BuildYourOwnLisp
Fix typo and re-write a sentence
Merge pull request #20 from vishalsodani/master

Fix typo and re-write a sentence
Fixing a small typo in chapter 1's text.
Merge pull request #21 from jbranchaud/chapter1_typo

Fixing a small typo in chapter 1's text.
Re-write couple of sentences
Merge remote-tracking branch 'upstream/master'
Merge pull request #22 from vishalsodani/master

Re-write couple of sentences
Fixed Corange Link
Removed brogrammer link
Merge remote-tracking branch 'upstream/master'
Improve a sentence
Improve a sentence
No capital letter here.

This is consistent with the rest of the chapter and how those keywords are
written.
Merge remote-tracking branch 'upstream/master'
Plural is need here.