[pkg-fgfs-crew] flightgear 3.2 packaging

[Rebecca Palmer]

My fgdata_checkers script ( 
https://gitorious.org/fg/fgmeta/source/841a58097b827d8e6815aeafe6a0274ba9803460:fgdata_checkers.py 
) can now generate a split package (like we use):

python3 -c "import fgdata_checkers; 
fgdata_checkers.create_reduced_fgdata(input_path='',output_path='debian/flightgear-data-{0}/usr/share/games/flightgear')"

(Not fully tested as I don't have time right now.  This would replace 
the copying around currently in debian/rules; you would need to delete 
Timezone, as well as LiberationFonts, afterwards.)

Making regional textures optional requires two different versions of 
preferences.xml (despite its name, this is the global default settings, 
not the saved user preferences), which this script outputs as 
preferences-regions.xml and preferences-noregions.xml; preferences.xml 
would then need to be a symlink to one of these depending on whether 
regional textures are installed.

I have also found that most of the aircraft package's size (220MB of 
305MB) is due to a single aircraft, the 777: should we simply omit that 
one (pass 
include_aircraft=['UIUC','b1900d','CitationX','ZLT-NT','dhc2','Cub','sopwithCamel','f-14b','ASK13','bo105','Dragonfly','SenecaII','A6M2'] 
to create_reduced_fgdata), and tell users to get it from Aircraft Center?