Update intro
another try with travis
Merge with master
Generate Markdown output
Merge branch 'origin/master'

Conflicts:
	book.md
Merge branch 'master'
Merge branch 'master' into introduction

Conflicts:
	book.md
Generate Markdown output
Merge branch 'master' into introduction
Fix typo
Generate Markdown output
Untracks book.md
Adds chapters numerotations in the conf
Generate Markdown output
Generate Markdown output
update
Update the build script to untrack the output
Generate Markdown output
test with the script
Untrack book.md
Generate Markdown output