Updated README. Cleaned comment.

README.md

diff --git a/README.md b/README.md
index ae63343..eb02941 100644
--- a/README.md
+++ b/README.md
@@ -53,6 +53,10 @@
 History
 -------
 
+v1.5.5, 31 Jul 2015
+-------------------
+ * [Pull Request #6](https://github.com/magiconair/properties/pull/6): Add [Delete](http://godoc.org/github.com/magiconair/properties#Properties.Delete) method to remove keys including comments. (@gerbenjacobs)
+
 v1.5.4, 23 Jun 2015
 -------------------
  * [Issue #5](https://github.com/magiconair/properties/issues/5): Allow disabling of property expansion [DisableExpansion](http://godoc.org/github.com/magiconair/properties#Properties.DisableExpansion). When property expansion is disabled Properties become a simple key/value store and don't check for circular references.

properties.go

diff --git a/properties.go b/properties.go
index 694c84a..4abb4ab 100644
--- a/properties.go
+++ b/properties.go
@@ -596,9 +596,8 @@
 
 // ----------------------------------------------------------------------------
 
-// Delete removes the key and its comments
-// abides by the rules of the builtin delete()
-func (p *Properties) Delete(key string) () {
+// Delete removes the key and its comments.
+func (p *Properties) Delete(key string) {
 	delete(p.m, key)
 	delete(p.c, key)
 	newKeys := []string{}