Log Message:
tex-elsarticle{,-doc}: update to 3.2

1. Additions: Two new environments have been defined to include
graphical abstract and highlights.  elsarticle.dtx and the templates
like elsarticle-template-num-names.tex, elsarticle-template-num.tex
and elsarticle-template-harv.tex have been updated.

2. Bug fixing: elsarticle-num.bst had a bug in it. Year was
duplicating in environments like article, book, misc etc.
This is corrected now.