Move dump, check and tpbconv utilities

These now form the start of the tools module, which is intended to
contain code for GROMACS tools whose use is not primarily for analysis
of data from simulations.

tpbcmp.* now named compare.*, since that code did not relate only to
run input files.

Removed declarations duplicated in legacycmodules.cpp in favour
of those in legacycmainfunctions.h.

Uncrustified, added copyright headers.

Change-Id: I48bf171f290fdfb177d5a020473b3a5296d89305