Improving the description of META6.json

For the time being, no new section. If you think it's absolutely necessary, reopen the issue.

Closes #551

Author: JJ

doc/Language/modules.pod6

@@ -537,6 +537,7 @@ lib
     {
         "perl" : "6.c",
         "name" : "Vortex::TotalPerspective",
+        "auth" : "github:SomeAuthor",
         "api" : "1",
         "version" : "0.0.1",
         "description" : "Wonderful simulation to get some perspective.",
@@ -546,7 +547,12 @@ lib
             "Vortex::TotalPerspective" : "lib/Vortex/TotalPerspective.pm6"
         },
         "depends" : [ ],
+        "build-depends" : [ ],
+        "test-depends" : [ ],
         "resources" : [ ],
+        "tags": [
+          "Vortex", "Total", "Perspective"
+        ]
         "source-url" : "git://github.com/R<you>/Vortex-TotalPerspective.git"
     }
     =end code
@@ -557,6 +563,8 @@ lib
     details). If the version number doesn't matter to you or your users
     right now, you can just put in an asterisk (*) for the version.
 
+    The C<auth> section identifies the author in GitHub or other repository hosting site, such as Bitbucket.
+
     The C<authors> section includes a list of all the module authors. In
     the case there is only one author, a single element list must be
     supplied.
@@ -582,7 +590,9 @@ lib
     list of the files in your C<resources> directory that you wish to be
     installed, these will be installed with hashed names alongside your
     library files and their installed location can be determined through the
-    C<%?RESOURCES> Hash indexed on the name provided.
+    C<%?RESOURCES> Hash indexed on the name provided. C<tags> is also optional, but is used to describe the module in the Perl6 ecosystem.
+
+    C<depends>, C<build-depends> and C<test-depends> include different modules that are used in those phases of the of installation. The last two are optional, but convenient. 
 
     The L<Test::META module | https://github.com/jonathanstowe/Test-META/>
     can help you check the correctness of the META6.json file.