add some diag/check dupl code to id dates
merge dupl fix

Merge branch 'master' of github.com:swish-climate-impact-assessment/AWAP_GRIDS

Conflicts:
	diagnostics/check_duplicates.r
add report code

Merge branch 'master' of github.com:swish-climate-impact-assessment/AWAP_GRIDS

Conflicts:
	diagnostics/check_duplicates.r