Issue #1: Fixed that Keys() returns an empty key.

README.md

@@ -44,6 +44,10 @@ $ go get -u github.com/magiconair/properties
 History
 -------
 
+v1.4.1, 13 Nov 2014
+-------------------
+ * (Issue #1) Fixed bug in Keys() method which returned an empty string
+
 v1.4.0, 23 Sep 2014
 -------------------
  * Added Keys() to get the keys

properties.go

@@ -362,7 +362,7 @@ func (p *Properties) Len() int {
 
 // Keys returns all keys.
 func (p *Properties) Keys() []string {
-	keys := make([]string, len(p.m))
+	keys := make([]string, 0, len(p.m))
 	for k, _ := range p.m {
 		keys = append(keys, k)
 	}

properties_test.go

@@ -560,6 +560,7 @@ func (l *TestSuite) TestKeys(c *C) {
 		p, err := parse(test.input)
 		c.Assert(err, IsNil)
 		c.Assert(p.Len(), Equals, len(test.keys))
+		c.Assert(len(p.Keys()), Equals, len(test.keys))
 		for _, key := range test.keys {
 			_, ok := p.Get(key)
 			c.Assert(ok, Equals, true)