Add support for tags linkS4class
Use filed 'Author' if 'Author@r' is not present
fix issue in rendering multiple author (they were duplicated as demos and vignettes) and  handle both 'author' and 'authors@r' fields
Add colored labels and signature in usage for S3 and S4 methods
Fix wrong label for S4 methods
Fix indentation and space issues
Fix indentation again...
Merge remote-tracking branch 'renozao/feature-S4'
Merge remote-tracking branch 'renozao/feature-linkS4class'
Merge remote-tracking branch 'renozao/fix-author'

Conflicts:
	R/util.r
	inst/templates/index.html
oops