2.1.31: Merge pull request #961 from td2014/master

Minor typo corrections.

2.1.30

Stahp updating bundler

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

Wording correction under "Removing Files" section

2.1.19

selectively demote headers for ebook generation

2.1.18: Merge pull request #932 from yunhailuo/master

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

2.1.17: Merge pull request #929 from Fornost461/patch-3

grammar

2.1.16: Merge pull request #928 from mdbrlh/update-recursive-clone-option

Update --recursive to --recurse-submodules

2.1.15: Merge pull request #924 from reitzig/patch-1

systemd config file uses full path to git binary.

2.1.14: Merge pull request #922 from gmarmstrong/patch-1

Remove "this can be confusing, because"

2.1.13: Merge pull request #918 from rpjday/packfiles

Minor tweaks (syntax, rewording) of "Packfiles" section