sha,message,author_date,committer_date,raw_author,raw_committer,repo,author,committer
80bf3afa43e3cb396c7a7c9b168eedbc6fe0fa15,"metadata.json support for per-table/per-database metadata

Also added support for descriptions and HTML descriptions.

Here's an example metadata.json file illustrating custom per-database and per-
table metadata:

    {
        ""title"": ""Overall datasette title"",
        ""description_html"": ""This is a <em>description with HTML</em>."",
        ""databases"": {
            ""db1"": {
                ""title"": ""First database"",
                ""description"": ""This is a string description & has no HTML"",
                ""license_url"": ""http://example.com/"",
        		""license"": ""The example license"",
                ""queries"": {
                	""canned_query"": ""select * from table1 limit 3;""
                },
                ""tables"": {
                    ""table1"": {
                        ""title"": ""Custom title for table1"",
                        ""description"": ""Tables can have descriptions too"",
                        ""source"": ""This has a custom source"",
                        ""source_url"": ""http://example.com/""
                    }
                }
            }
        }
    }

Closes #165, Refs #164",2017-12-07T16:42:54Z,2017-12-07T16:47:07Z,13ae486343ea6454a93114c6f558ffea2f2c6874,13ae486343ea6454a93114c6f558ffea2f2c6874,107914493,9599,9599