FlightGear - Flight Simulator FGAddon

mosquito: add support for Bombable.

* Nasal/bombable.nas: new, copied and adjusted from the MiG-15.
* Models/submodels.xml: add ammo for the four .303 machine guns and
four Hispano Mk II 20-mm cannon.
* Models/Mosquito-FB6.xml, mosquito-fbVI-set.xml: change the properties
used for the guns and cannon over multiplayer. Use generic boolean
properties introduced in FlightGear 2017.2.
* Nasal/mosquito.nas: add cannon lights.
* mosquito-common.xml (keyboard): e for guns, E for cannon.

v:0.3 README.first updated

minor changes\n

AirCrane: Correct error in calculating liquid flow into and out of external tank

767-300: add variant-of tag to the -ER.

MiG-15: give (and take) credit where credit is due: author tag (thinko - d'oh!).

MiG-15: give (and take) credit where credit is due: author tag.

Citation: bump version number.

Citation: Enable spoken ATIS. Bug reported by pilot WST at Klagenfurt. Thanks!

* Systems/instrumentation.xml: add comm1, comm2 to enable spoken ATIS.
* Nasal/Electrical.nas: set the "power-btn" property for comm/nav to
true iff the device is "serviceable" (i.e. its power button is on)
and it receives electricity.
* Models/Instruments/VHF-22/ctl22-com[12].xml,
Models/Instruments/VIR-32/ctl32-nav[12].xml: use the "power-btn"
property to determine whether the device is actually operating.

CitationX: add weight and speed limits. The speed limits change with altitude.