create highs_lows.r; save top 10 as .csv and .xls::

separated from its original place in compare_scores.r. Saves top/bottom scores by scenario as separate .csv files on github and as .xls sheet on Neptune.
merge

Merge branch 'master' of https://github.com/OHI-Science/ohidev

Conflicts:
	report/highs_lows.R