Add more features and limitations to README

Also use more accurate links for upstream issues.

README.md

@@ -1,16 +1,16 @@
 S3Proxy
 =======
 S3Proxy allows applications using the S3 API to interface with a variety of
-object stores, e.g., EMC Atmos, Microsoft Azure, OpenStack Swift.  It runs a
-local HTTP server which translates S3 operations into provider-specific
-operations.  S3Proxy also allows developers to test against S3 without the cost
-or latency associated with using AWS by using the local file system.
+object stores, e.g., EMC Atmos, Microsoft Azure, OpenStack Swift.  It also
+allows local testing against S3 without the cost or latency associated with
+using AWS.
 
 Features
 --------
 * create, remove, and list buckets (including user-specified regions)
 * put, get, delete, and list objects
 * store and retrieve object metadata, including user metadata
+* authorization via AWS signature v2 (including pre-signed URLs) or anonymous access
 
 Supported object stores:
 
@@ -26,44 +26,48 @@ Supported object stores:
 
 Installation
 ------------
-Users can
-[download releases](https://github.com/andrewgaul/s3proxy/releases) from GitHub
-and should `chmod +x s3proxy` afterwards.
-
-One can also build the project by running `mvn package` which produces a binary
-at `target/s3proxy`.
-
-S3Proxy requires Java 7 to run.
+Users can [download releases](https://github.com/andrewgaul/s3proxy/releases)
+from GitHub.  One can also build the project by running `mvn package` which
+produces a binary at `target/s3proxy`.  S3Proxy requires Java 7 to run.
 
 Examples
 --------
-Linux and Mac OS users can run S3Proxy either via the executable jar or by
-explicitly invoking java:
+Linux and Mac OS users can run S3Proxy via the executable jar:
 
 ```
+chmod +x s3proxy
 s3proxy --properties s3proxy.conf
+```
+
+Windows users must explicitly invoke java:
+
+```
 java -jar s3proxy --properties s3proxy.conf
 ```
 
-Windows users must explicitly invoke java.
-
-Configuration
--------------
-Users can configure S3Proxy via a properties file.  An example:
+Users can configure S3Proxy via a properties file.  An example using Rackspace
+CloudFiles (based on OpenStack Swift) as the backing store:
 
 ```
-jclouds.provider=transient
+s3proxy.endpoint=http://127.0.0.1:8080
+s3proxy.authorization=aws-v2
+s3proxy.identity=local-identity
+s3proxy.credential=local-credential
+jclouds.provider=cloudfiles-us
+jclouds.identity=remote-identity
+jclouds.credential=remote-credential
+```
+
+Another example using the local file system as the backing store with anonymous
+access:
+
+```
+s3proxy.authorization=none
+s3proxy.endpoint=http://127.0.0.1:8080
+jclouds.provider=filesystem
 jclouds.identity=identity
 jclouds.credential=credential
-# endpoint is optional for some providers
-#jclouds.endpoint=http://127.0.0.1:8081
-jclouds.filesystem.basedir=/tmp/blobstore
-
-s3proxy.endpoint=http://127.0.0.1:8080
-# authorization must be aws-v2 or none
-s3proxy.authorization=aws-v2
-s3proxy.identity=identity
-s3proxy.credential=credential
+jclouds.filesystem.basedir=/tmp
 ```
 
 Users can also set a variety of Java and
@@ -73,11 +77,12 @@ Limitations
 -----------
 S3Proxy does not support:
 
-* single-part uploads larger than 2 GB ([upstream issue](https://github.com/jclouds/jclouds/pull/426))
+* single-part uploads larger than 2 GB ([jclouds issue](https://issues.apache.org/jira/browse/JCLOUDS-264))
 * multi-part uploads
 * POST uploads
-* bucket and object ACLs
-* object metadata with filesystem provider ([upstream issue](https://github.com/jclouds/jclouds/pull/443))
+* bucket and object ACLs ([jclouds issue](https://issues.apache.org/jira/browse/JCLOUDS-660))
+* object metadata with filesystem provider ([jclouds issue](https://issues.apache.org/jira/browse/JCLOUDS-658))
+* object versioning
 * listening on HTTPS
 
 References