Code blocks to have scrollbar

[ryanholder]

Currently our code blocks are wrapping the text where we would rather have it remain on it's line and have a scrollbar to view more.

[ryanholder]

@mrdavidlaing this page has some strange scroll issues which may be due to the docs - http://www.logsearch.io/docs/boshrelease/getting-started/deploying-logsearch.html