Laying out new material
Importing shell lesson for novices
Fixing title (needs to be H1, not H2)
Example files for intro to shell
Fixing headers and image links
First draft of glossary
Tidying up shell lesson
Merge branch 'master' into new-shell-beginner-lessons
Inserting keypoints and objectives (but they're not formatting properly)
Fixed bugs in challenges
Added missing files for 05-script.md lesson
Added some of Nelle Nemo's data files
Changed haiku.txt so it matches the 06-find.md lesson
Putting titles etc. into page headers
Fixing example explaining why people shouldn't use spaces in filenames
Experimenting with Kramdown
Put randomly generated data in files
Merge pull request #170 from DamienIrving/shell-edits

Small edits/additions to the novice shell lessons - take 2
Updating index files
Renaming directories with example files