Added some methods to Vector

Change-Id: I7aa24488b3141e848cd958ed14bfd8544163b3a4
Added some string methods

Change-Id: I8babab1b58418c1e77cecd819fb1e9fae1ec2b04
Added some StringOutputStreamMethods

Change-Id: I2eab31bcb972e78a85917dd697e6f4aa302a1d04