add `pkg-desc' and `pkg-authors' to each package

This information will be used to construct a catalog from the
package directories.

original commit: 057bfc2ea1a24e85ece2d5f85da30076643ea598

pkgs/parser-tools-pkgs/parser-tools-doc/info.rkt

@@ -6,3 +6,7 @@
                      "syntax-color-doc"
                      "parser-tools-lib"
                      "scribble-lib"))
+
+(define pkg-desc "documentation part of \"parser-tools\"")
+
+(define pkg-authors '(mflatt))

pkgs/parser-tools-pkgs/parser-tools-lib/info.rkt

@@ -4,3 +4,7 @@
 (define deps '("base"
                "compatibility-lib"))
 (define build-deps '("rackunit-lib"))
+
+(define pkg-desc "implementation (no documentation) part of \"parser-tools\"")
+
+(define pkg-authors '(mflatt))

pkgs/parser-tools-pkgs/parser-tools/info.rkt

@@ -6,3 +6,7 @@
                "parser-tools-doc"))
 (define implies '("parser-tools-lib"
                   "parser-tools-doc"))
+
+(define pkg-desc "Lex- and Yacc-style parsing tools")
+
+(define pkg-authors '(mflatt))