And fix wrong length check along the way

At level ERROR, warnings were being printed too.

And add additional check

This gets rid of the GLib-CRITICAL from a failed assertion

Also remove the now superfluous 'id show' command
And clean up the 'status' output a bit

In libpurple-speak, 'IM' is a conversation just between two people.

Will contain all functions currently available through the command
UI and make them available through signals.

Also started a new command UI which will work through the API.
Started pulling things out of the one source file.

Version to use in directory and file name can be specified in env
This fixes #94

This fixes #107.

This fixes #127.

This fixes #113.

If build-essential isn't installed on the system it complains about "No CMAKE_CXX_COMPILER could be found"