tidying Sass
removing the word 'search' from the search box resolves #42
aligning start again link with close button - This fixes #43
centered H1 abd removed CSS transform to uppercase. Heading text change requires a db change - fixes #44
increased font size of decsion count in tabs - fixes #45
increased font size of h2 in search-terms. Fixes #46
increased contrast on tabs - closes #47
ramping up results background colours - resolves #48
added distinct background colours to overlay header and footer - resolves #50
making overlay close buttons the same sizes - resolves #51
Merge pull request #68 from ministryofjustice/designAmmends

Design ammends