This patch adds colouring for the keyword 'switch' and 'case' in the Vim theme for the Go programming langauge.
The loop keyword 'for' and the builtin function 'range' for the Go programming language lack colour in this theme. This is fixed by adding a declaration for 'goRepeat' to the Go section in the theme.
Colors weren't set properly. Noticed that the colors looked a bit off compared to Sublime Text and Terminal versions of the Tomorrow Night Eighties theme I had. I used Skala Color (http://bjango.com/mac/skalacolor/) to view the hex codes for the colors in the Xcode theme, confirmed they were a bit off, and then manually entered the correct hex colors.