Added Temperature Probe component, a contact thermometer for hull blocks and panels
Computer: Added device(), device_at() and device_count() to inspect the components connected to a computer (type, alias, temperature, damage, position, size, mass)
Volume/Tank: Added a Creative-only "Fill with atmosphere" button that fills with the planet's air at sea-level pressure
Bugfix: aiming at a pipe in raster mode was always selecting the build's first pipe (deleting/painting targeted the wrong pipe; also fixed placing blocks on frame beams targeting the wrong beam)