* Instruments/fuel_pressure_R.xml, oilpress_R.xml, oiltemp_R.xml: delete.
* Instruments/fuel_pressure_L.xml, oilpress_L.xml, oiltemp_L.xml:
rename to *.xml and take parameters.
* Lockheed1049h_Instruments.xml: load the renaed .xml files and pass
parameters.
* Instruments/egttemp.xml: minor bug fix in the lighting.