Initial commit.
SVN revision 406.
New feature: Custom Css.
To activate locally make sure to Network Enable the PressBooks Custom Theme.
IMPORTANT: Not yet released to the public. Work in progress.
initial commit for epub import
Change to abstract class

Tried not to change any functionality, just neutralize the import
functionality to begin to resemble something that can be extended to
other file types.

Re-created an as yet unfinished abstract class and modified some of the
language around epub specific files.

Added some documentation, more to come.

copied over some functions that will come in handy later.
documentation and validation

beefed up the documentation and the epub validate functionality with
epubcheck so that we are only pulling in EPUB 2. If epubcheck generates
errors validating the import file, instead of bailing, it just produces
a warning message.
SVN Internal commit 422
Merge pull request #9 from bdolor/pb-internal-svn

SVN Internal commit 422
merged fork code with import
added import menu page