Fix link to Thunderbird instructions
Fix link to staff directory
Fix typo
Update ifconfig output to reflect new network numbering

IP addresses allocated on the Pi network have changed - update the output of ifconfig so that it reflects this.
Change Moodle link to use HTTPS
Fix link to printing information

IT Services have reorganised their website and mainly links no longer work or redirect correctly.
Use \pounds command instead of symbol

Pound sign does not always display correctly in PDFs, whereas \pounds does.
Merge pull request #3 from pwaring/master

Small changes from reading through lab notes