Add page numbering option to .collate files
- Move test helpers into test
- Add delete outfiles helper
- Update lesson plan generation documentation
Remove false statements
Add aptitude dependency to rake webserver setup step
Simplify bash command wrapper
Quiet enscript
Remove non-numbered PDF on test
Add PDF utility used in tests
Move into output dir
Tweak margin for Ubuntu. Fixes tests.
Add full PDF page number check
Merge remote-tracking branch 'remotes/origin/staging' into pdf_page_numbers

Conflicts:
	pegasus/Gemfile.lock
Update from bundle install
Merge pull request #15 from code-dot-org/pdf_page_numbers

Add page numbering option to .collate files [finishes #78234732]