Added godeps and the source for the go freetype library

Godeps/Godeps.json

@@ -2,6 +2,10 @@
 	"ImportPath": "github.com/mattermost/platform",
 	"GoVersion": "go1.4",
 	"Deps": [
+		{
+			"ImportPath": "code.google.com/p/freetype-go/freetype",
+			"Rev": "46c3056cafbb4da11c4087a892c7d2bfa4224a8f"
+		},
 		{
 			"ImportPath": "code.google.com/p/go-uuid/uuid",
 			"Comment": "null-15",