Add changelog

Author: jimporter

CHANGES.md

@@ -0,0 +1,11 @@
+# Changes
+
+## v0.2 (in progress)
+
+- Use `std::string_view` if available
+- Install a `pkg-config` `.pc` file that sets the compiler's include path as
+  needed
+
+## v0.1 (2016-07-01)
+
+Initial release

build.bfg

@@ -27,4 +27,4 @@ except PackageResolutionError:
     warning('mettle not found; tests disabled')
 
 pkg_config()
-extra_dist(files=['README.md', 'LICENSE'])
+extra_dist(files=['README.md', 'CHANGES.md', 'LICENSE'])