Log message:
Fixes:

 COMMENT should not be longer than 70 characters.
 COMMENT should not begin with 'A'.
 COMMENT should not begin with 'An'.
 COMMENT should not begin with 'a'.
 COMMENT should not end with a period.
 COMMENT should start with a capital letter.

pkglint warnings. Some files also got minor formatting, spelling, and style
corrections.

Log message:
Add py-cssselect.

cssselect parses CSS3 Selectors and translate them to XPath 1.0
expressions. Such expressions can be used in lxml or another XPath
engine to find the matching elements in an XML or HTML document.

This module used to live inside of lxml as lxml.cssselect before
it was extracted as a stand-alone project.