Added swiftmail libraries

.gitmodules

@@ -10,3 +10,9 @@
 [submodule "libraries/lithium"]
 	path = libraries/lithium
 	url = git://github.com/UnionOfRAD/lithium.git
+[submodule "libraries/li3_swiftmailer"]
+	path = libraries/li3_swiftmailer
+	url = https://github.com/greut/li3_swiftmailer.git
+[submodule "libraries/swiftmailer"]
+	path = libraries/swiftmailer
+	url = https://github.com/swiftmailer/swiftmailer.git

libraries/li3_swiftmailer

@@ -0,0 +1 @@
+Subproject commit a5057ba921bb2c89e99b74faf3254ffb68d93d65

libraries/swiftmailer

@@ -0,0 +1 @@
+Subproject commit dd12451308198f0a8576a51ed12c02258c0b8ef5