change source format from HTML to Markdown: Chapter 11
change source format from HTML to Markdown: Chapter 10
rename Chapter 12 (normalize filenames)
change source format from HTML to Markdown: Chapter 12
ch10: CRLF -> LF
chapters 13, 14, 17: normalize filenames, CRLF -> LF
change source format from HTML to Markdown: Chapter 13
change source format from HTML to Markdown: Chapter 14
change source format from HTML to Markdown: Chapter 17
change source format from HTML to Markdown: Chapter 7
Merge pull request #11 from rb2/format-markdown

re Flar49/passionate-programmer-translation#8 -- Format: markdown