update gh-pages and fix #1285 in preparation for 3.2-4 release

rebuild gh-pages prior to 3.2-3 release

Give error when sleeplog column names do not match sleepwindowType va…

…lue, fixes #1283

rebuild github.io

tidying up documentation and changelog prior to 3.2-0 release

tidy up NEWS and rebuild pages

prepare GitHub-only 3.1-10 release

rebuild gh-pages for 3.1-9 release

rebuild vignette in preparation for GitHub only 3.1-8 release

Update note at top of vignette page and rebuild gh-pages