Move update check and survey to the new domain

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Replace other references to hohndel.org

The only place where I'm not sure if there are unintended sideeffects of
changing over to the new domain is QCoreApplication::setOrganizationDomain

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Update todo list for CCR

Signed-off-by: willem ferguson <willemferguson@zoology.up.ac.za>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Cleaning up pressures

Added comment about meaning of o2pressure in struct plot_info.

Turned some pressures from double (in bar) to pressure_t (in mbar)

[Dirk Hohndel: picked parts of this patch and dropped others]

Signed-off-by: Robert C. Helling <helling@atdotde.de>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>