net.Socket missing `.setKeepAlive()`/`.setNoDelay()`

[natevw]

Again, it's unclear to me whether the CC3K even allows control of this one way or the other. See e.g. http://e2e.ti.com/support/wireless_connectivity/f/851/t/295944.aspx

[natevw]

Via #313 (comment) it looks like the CC3K has a global keep-alive setting… hmmmm…