Removed extraneous 'doxygen.hpp' file.

This file had been included to inject the 'amp' namespace into the
documentation, because it was mysteriously not showing up; I hadn't realized at
the time that I was generating docs from the wrong directory tree, so this file
was unnecessary.
Wrote simple test class in 'term/' for sending xterm control sequences to
terminal.

The terminal class will define c-string constants and methods for sending
control sequences to the terminal via standard output streams.