Merge branch 'maint/v0.21'

Author: arthurschreiber

CHANGELOG.md

@@ -108,6 +108,16 @@
     *Mindaugas Mozūras*
 
 
+## Rugged 0.21.4 (January 18, 2015) ##
+
+*   Update bundled libgit2 to 0.21.4.
+
+    See https://github.com/libgit2/libgit2/releases/tag/v0.21.4 for a list
+    of fixed issues.
+
+    *Arthur Schreiber*
+
+
 ## Rugged 0.21.3 (December 18, 2014) ##
 
 *   Update bundled libgit2 to 0.21.3.