First step.
Update header.
Merge pull request #1 from denisshevchenko/master

First chapter
Little correction of a dshevchenko console  Feb 13 14:12
dshevchenko ttys000  Mar 12 00:08
dshevchenko ttys001  Mar 14 15:39  chapter.
Add of  chapter.
Added chapter 0 of part 1. The filename is formated this way.

	[Part][Chapter]-[Title_of_chapter].md

Markdown doesn't support footnotes so I used links instead, that should
do the job.
Added a missing newline before the list.
Fixed markup of parenthesis around footnotes.
Some language fixes.
Added missing comma
Merge pull request #2 from zudov/chapter01

Chapter01
Merge pull request #1 from jhenahan/master

Sync with main repo