Do not retire air hanger without replacement.
Change path in Makefile.
Merge branch 'master' of git://github.com/jamespetts/simutrans-pak128.britain
Merge branch 'master' of git://github.com/jamespetts/simutrans-pak128.britain
Merge branch 'master' of git://github.com/jamespetts/simutrans-pak128.britain
Merge branch 'master' of git://github.com/jamespetts/simutrans-pak128.britain

Conflicts:
	depots/air-hangar-modern.dat
Merge branch 'master' of git://github.com/jamespetts/simutrans-pak128.britain
Merge branch 'master' of git://github.com/jamespetts/simutrans-pak128.britain
Merge branch 'master' of git://github.com/jamespetts/simutrans-pak128.britain
Merge branch 'master' of git://github.com/jamespetts/simutrans-pak128.britain
Merge branch 'master' of git://github.com/jamespetts/simutrans-pak128.britain
Merge branch 'master' of git://github.com/jamespetts/simutrans-pak128.britain