Delete unused files from tools/

Many are related to sourceforge (websync, sfupload),
or related to documentation building (we use readthedocs),
noah's dotfiles are also in here (256K), or contain
NameError (pyed).

This leaves getkey and step, which do not seem terribly
useful to include in the pexpect archive.
Introduce script to display all signal handlers

Having a strange issue that only occurs on teamcity
agents, but not from a local shell.  I suspect it
may have to do with isatty() or the build agent
"launcher" which monitors and restarts the agent
should it disappear.