Update changelog and website for 0.5.1 release (rust-ml#204)

* Update changelog and website for 0.5.1 release

Author: YuhanLiin

CHANGELOG.md

@@ -1,3 +1,15 @@
+Version 0.5.1 - 2022-02-28
+========================
+
+Note that the commits for this release are in the `0-5-1` branch.
+
+Changes
+-----------
+ * remove `Float` trait bound from many `Dataset` impls, making non-float datasets usable
+ * fix build errors in 0.5.0 caused by breaking minor releases from dependencies
+ * fix bug in k-means where the termination condition of the algorithm was calculated incorrectly
+ * fix build failure when building `linfa` alone, caused by incorrect feature selection for `ndarray`
+
 Version 0.5.0 - 2021-10-20
 ========================
 

docs/website/content/news/release_051.md

@@ -0,0 +1,13 @@
++++
+title = "Release 0.5.1"
+date = "2022-02-28"
++++
+
+Linfa's 0.5.1 release fixes errors and bugs in the previous release, as well as removing useless trait bounds on the `Dataset` type. Note that the commits for this release are located in the `0-5-1` branch of the GitHub repo.
+
+## Improvements
+
+ * remove `Float` trait bound from many `Dataset` impls, making non-float datasets usable
+ * fix build errors in 0.5.0 caused by breaking minor releases from dependencies
+ * fix bug in k-means where the termination condition of the algorithm was calculated incorrectly
+ * fix build failure when building `linfa` alone, caused by incorrect feature selection for `ndarray`