Merge pull request #9 from Shashi-Sagwan/master

Chap2 +
Update README.md
fixed readme
added pdf options
fixed link issue
major structure update
updated
Merge branch 'master' of https://github.com/phatak-dev/draft_book
updated the links
added book json
updated tagline
better introduction
updated the acknowledgments
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Merge branch 'master' of https://github.com/phatak-dev/draft_book