update old links

Author: puredanger

README.md

@@ -133,7 +133,7 @@ Example Usage
     ;=> {:a 1, :d 13, :b 42}
 ```
 
-Refer to docstrings in the `clojure.core.cache` or `clojure.core.cache.wrapped` namespaces, or the [autogenerated API documentation](http://clojure.github.com/core.cache/) for additional documentation.
+Refer to docstrings in the `clojure.core.cache` or `clojure.core.cache.wrapped` namespaces, or the [autogenerated API documentation](http://clojure.github.io/core.cache/) for additional documentation.
 
 
 Developer Information

docs/release-notes/release-0.6.1.markdown

@@ -43,7 +43,7 @@ Places
 * [Source code](https://github.com/clojure/core.cache)
 * [Ticket system](http://clojure.atlassian.net/browse/CCACHE)
 * [Announcement](http://groups.google.com/group/clojure/browse_frm/thread/69d08572ab265dc7)
-* [API Reference](https://clojure.github.com/core.cache)
+* [API Reference](https://clojure.github.io/core.cache)
 * [Examples and documentation](https://github.com/clojure/core.cache/wiki) (work in progress)
 
 Changes from v0.5.0

docs/release-notes/release-0.6.2.markdown

@@ -43,7 +43,7 @@ Places
 * [Source code](https://github.com/clojure/core.cache)
 * [Ticket system](http://clojure.atlassian.net/browse/CCACHE)
 * [Announcement](http://groups.google.com/group/clojure/browse_frm/thread/69d08572ab265dc7)
-* [API Reference](https://clojure.github.com/core.cache)
+* [API Reference](https://clojure.github.io/core.cache)
 * [Examples and documentation](https://github.com/clojure/core.cache/wiki) (work in progress)
 
 Changes from v0.6.1
@@ -72,4 +72,4 @@ The following capabilities are under design, development, or consideration for f
 * Deprecation of Clache
 * More documentation and examples
 
-More planning is needed around capabilities not listed nor thought of.
+More planning is needed around capabilities not listed nor thought of.