Fine, build the book again

wups

Debugging build issues

Merge pull request progit#941 from aollier/bzrignore

taking into account the syntax of Bazaar

Merge pull request progit#957 from tansaku/patch-1

indicate what running git from the terminal actually is for a newbie

Merge pull request progit#955 from yunhailuo/issue950

resolves progit#950 - Mislabel in figure 69

Merge pull request progit#942 from TopView/patch-1

fixed minor grammar mistake

Merge pull request progit#936 from dinokaric/2.2-Format/Wording

Wording correction under "Removing Files" section

selectively demote headers for ebook generation

Merge pull request progit#932 from yunhailuo/master

resolves progit#925 partial fix for ePub Validation and Google Books failure.