* Refactor the TCP transport to deal with changing identities gracefully,
and to prevent some wasted effort by keeping track of what host+port
combinations we are connected to (rather than just the identities). Also
catch a few configuration errors earlier.
* Removed no longer relevent methods from the Transport API that were
exposing ideas that probably shouldn't be exposed.
* Removed the 0.4.0.1 specific files from i2pupdate.zip (relating to script
updates)