Turn urls into links in community.md (apache#148)

README.md

@@ -24,7 +24,7 @@
 
 Apache Iceberg (incubating) is a new table format for storing large, slow-moving tabular data. It is designed to improve on the de-facto standard table layout built into Hive, Presto, and Spark.
 
-Background and documentation is available at [iceberg.incubator.apache.org](https://iceberg.incubator.apache.org)
+Background and documentation is available at <https://iceberg.incubator.apache.org>
 
 
 ## Status

site/docs/community.md

@@ -36,7 +36,7 @@ Issues are tracked in GitHub:
 
 ### Contributing
 
-Iceberg uses Apache's GitHub integration. The code is available at https://github.com/apache/incubator-iceberg
+Iceberg uses Apache's GitHub integration. The code is available at <https://github.com/apache/incubator-iceberg>
 
 The Iceberg community prefers to receive contributions as [Github pull requests][github-pr-docs].
 
@@ -51,13 +51,13 @@ The Iceberg community prefers to receive contributions as [Github pull requests]
 
 Iceberg has three mailing lists:
 
-* **Developers**: [email protected] -- used for community discussions
+* **Developers**: <[email protected]> -- used for community discussions
     - [Subscribe](mailto:[email protected])
     - [Unsubscribe](mailto:[email protected])
     - [Archive](https://lists.apache.org/[email protected])
-* **Commits**: [email protected] -- distributes commit notifications
+* **Commits**: <[email protected]> -- distributes commit notifications
     - [Subscribe](mailto:[email protected])
     - [Unsubscribe](mailto:[email protected])
     - [Archive](https://lists.apache.org/[email protected])
-* **Private**: [email protected] -- private PMC list for committer nominations
+* **Private**: <[email protected]> -- private PMC list for committer nominations
     - [Archive](https://lists.apache.org/[email protected])