Initital start on implementing the various write functions in LmSoupSocket

Call connect on SoupSocket in LmSoupSocket::connect

Renamed the implementation of the LmSocket interface functions to _soup_socket.. The naming policy of Loudmouth says that the static functions for LmSoupSocket should be named soup_socket_... but in this case that makes the name collide with functions in Libsoup. Prefixed the functions with _ to work around that.

Added prototypes for LmSocket interface in LmSoupSocket

Changed the LmSocket signals slightly

Added Libsoup as a dependency in configure.

Worked on the LmSocket interface and added a LmSoupSocket class. LmSoupSocket will be a possibly temporary implementation of the LmSocket interface on top of the SoupSocket API in order to get something going quickly. Depending on how it works out it might be made the default implementation. Added signals and worked a bit to model the LmSocket API after the SoupSocket API as it seems quite similar to what I had in mind.

Made LmSocket into an interface and hooked up implementation of it in LmTcpSocket. This design allows for the unit test framework to hook into it's mock socket object in order to short cut the network communication.

Added basic API for the new LmSocket

Renamed LmSocket to LmOldSocket to make room for a new socket abstraction layer.