Merge pull request #35 from gvwilson/tidying-up-wording

Simplifying Markdown files even further.
Removing FIXME markers from head of file
Remove spurious colon from GitHub URL.
Merge pull request #37 from benwaugh/gh-pages

Remove spurious colon from installation instructions.
Moving to Issues - Problems using HTTPS URL to clone from GitHub
Need / in step 4 of manual installation

Changed URL in step 4 of the manual installation section so it works
Change manual setup instructions

The old instructions would fail on older versions of Git.
No one has complained about the Git commands in the create
script yet, though, so this updates the manual instructions
to more or less follow the exact same steps done by the
create script, including the same Git commands.

Now, instead of creating and cloning an empty repo, users
are instructed to create a new repo, but clone the workshop-template
repo and add their new repo as a remote.
Merge pull request #40 from jiffyclub/manual-git

Change manual setup instructions
Removing warnings
Added instructions for those who can't install dependencies
Fixed typos
Merge pull request #41 from DamienIrving/patch-1

Added instructions for those who can't install dependencies
Further tidy-up based on email feedback.

1. Moved the software installation instructions down so that "how I set up" is the first thing readers see.
2. Changed titles.
3. Changes "customization instructions below" to link to `CUSTOMIZATION.md`.
4. Changed nested of software installation instructions so that PyYAML wasn't under Jekyll.