Fix #67
Grammar
Merge pull request #69 from limenet/patch-1

Grammar
actually change the name of chapter 7
Grammar
Merge pull request #70 from limenet/patch-1

Grammar
Generated New PDFs
Grammar
one more
README fixes

I took the liberty to quickly proof the README and changed all the
references to LaTeX to a unified spelling of the word
Incorrect transcription from the source
comma!
plural
Merge pull request #71 from limenet/master

Chapter 8, 9 & README: minor fixes
Generated New PDFs
added a couple of details
improvements, corrections.
corrections
improvements, corrections
improvements. mooore improvements