Italicize vim comments (#101)

Author: jawang35

vim/colors/onehalfdark.vim

@@ -123,7 +123,7 @@ call s:h("WildMenu", s:fg, "", "")
 " See :help hl-Whitespace and :help hl-SpecialKey
 call s:h("Whitespace", s:non_text, "", "")
 call s:h("NonText", s:non_text, "", "")
-call s:h("Comment", s:comment_fg, "", "")
+call s:h("Comment", s:comment_fg, "", "italic")
 call s:h("Constant", s:cyan, "", "")
 call s:h("String", s:green, "", "")
 call s:h("Character", s:green, "", "")

vim/colors/onehalflight.vim

@@ -123,7 +123,7 @@ call s:h("WildMenu", s:fg, "", "")
 " See :help hl-Whitespace and :help hl-SpecialKey
 call s:h("Whitespace", s:non_text, "", "")
 call s:h("NonText", s:non_text, "", "")
-call s:h("Comment", s:comment_fg, "", "")
+call s:h("Comment", s:comment_fg, "", "italic")
 call s:h("Constant", s:cyan, "", "")
 call s:h("String", s:green, "", "")
 call s:h("Character", s:green, "", "")