comment parts in the OPF
add support for book with overridden titles
increase the drop area on nodes
cloning a book keeps the overridden title (or original if it was not overridden)
forgot to finish fixing the bigger dropzone
reduce number of reparses when dropping content
Merge branch 'master' into atc-fixes

Conflicts:
	scripts/views/workspace/sidebar/toc-branch.coffee
fixes disappearing ToC titles on load
fixes DnD onto chapters
Merge branch 'master' into atc-fixes

Conflicts:
	scripts/gh-book/opf-file.coffee
Merged better file names wtih atc fixes
fix renaming modules
title edit shows the current title instead of empty title
only change title when it differs
Merge pull request #53 from oerpub/atc-fixes

Fixes to get atc working again