update docs, bump version to 0.6.0-pre
diff --git a/README.rst b/README.rst
index 11d7c6a..03dddc8 100644
--- a/README.rst
+++ b/README.rst
@@ -3,9 +3,8 @@
 
 A Python implementation of the JSON5 data format.
 
-`JSON5 <https://github.com/aseemk/json5>`_ extends the
-`JSON <http://www.json.org>`_ data interchange format to make it
-slightly more usable as a configuration language:
+`JSON5 <https://www.json5.org>`_ extends the `JSON <http://www.json.org>`_
+data interchange format to make it more usable as a configuration language:
 
 * JavaScript-style comments (both single and multi-line) are legal.
 
@@ -15,22 +14,18 @@
 
 * Strings can be single-quoted, and multi-line string literals are allowed.
 
-There are a few other more minor extensions to JSON; see the above page for
+There are a few other more minor extensions to JSON; see the above pages for
 the full details.
 
 This project implements a reader and writer implementation for Python;
-where possible, it mirrors the
-`standard Python JSON API <https://docs.python.org/library/json.html>`_
-package for ease of use.
-
-This is an early release. It has been reasonably well-tested, but it is
-*SLOW*. It can be 1000-6000x slower than the C-optimized JSON module,
-and is 200x slower (or more) than the pure Python JSON module.
+mirroring the
+`standard JSON package <https://docs.python.org/library/json.html>`_'s API.
 
 Known issues
 ============
 
-* The `cls` keyword argument that json.load()/json.loads() accepts to
-  specify a custom subclass of JSONDecoder is not and will not be supported,
-  because this implementation uses a completely different approach and
-  doesn't have anything like the JSONDecoder and JSONEncoder classes.
+This is an early release. It has been well-tested and is feature-complete
+(it implements the full JSON spec including proper handling of Unicode
+identifiers, unlike even the reference JavaScript implementation), but it is
+*SLOW*. It can be 1000-6000x slower than the C-optimized JSON module,
+and is 200x slower (or more) than the pure Python JSON module.
diff --git a/json5/version.py b/json5/version.py
index 985626a..cb27487 100644
--- a/json5/version.py
+++ b/json5/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-VERSION = '0.5.1'
+VERSION = '0.6.0-pre'