Releases for Advanced Help Injection and Export

#450376: Unused functions getting rid of unused functions.
Correct the destination when creating a book page from the injection form.

1. #416068: An even easier workflow: click the plus to start writing the help text for that location by CrashTest_: Link to node/add from the inject page, complete with destination and lightbox2 integration, so that you can add new books to the book structure within the workflow of injecting.
2. Eliminate warning on export if no files

With this release you can, for the first time, follow the full workflow of writing, injecting, and exporting help.

1. Create your documentation in a book structure.
2. Enable the helpinject module
3. Using the (+) icons that now appear everywhere, "inject" your help into the pages and forms by linking (+) icons to book pages.
4. Export the help to a new module at admin/build/helpinject
5. Move the generated module (found in your files directory) to your sites/all/modules directory.
6. Disable helpinject and enable the module you generated.