Log Message:

Updated to 0.37.0

 pkg_lint_summary:
   - If problems were encountered, an exit status is 1

   - New option -d for checking that all required dependencies are
     present in input summary. For details, see a manual page.

 pkg_grep_summary:
   - New option -S for grepping summaries using a list of PKGPATHs,
     PKGBASEs or whatever else stored in a file. For details, see a
     manual page.

   - New artificial field for searching: "PKGPATHe". This is an
     enriched PKGPATH, i.e. PKGPATH and ASSIGNMENTS (if present)
     separated by a colon (`:') symbol.

   - optimizations