Merge pull request #1 from benwaugh/master

First outline of SQL material
Updated setup instructions with Windows stack script
Clarified windows python script download and save.
Render editor and shell setup as code.
Merge pull request #2 from willu47/amend_setup

Updated setup instructions with Windows stack script
Update install.md

Fix typos
Update install.md

Include notepad++ in windows setup.
Update install.md

Add Xcode and command line tools to OSX install options, just in case.
Update install.md

Install git via homebrew as an alternative to msysgit on mac.
Update install.md

Whoops, put the mac git via brew instructions in the windows bit. Moved.
Update install.md

Make homebrew the alternative, not the default.
Update install.md

Suggest homebrew for sqlite
Merge branch 'master' of github.com:UCL/ucl_software_carpentry

Conflicts:
	.gitignore