language names database not automatically found in packaged version

[jonorthwash]

When running [debian-]packaged version, langNames.db is not automatically found, and so apertium-apy must be run with -l /usr/share/apertium-apy/langNames.db.

[sushain97]

apertium-apy/apertium_apy/apy.py

Line 185 in b9455b3

help='path to localised language names sqlite database (default = langNames.db)', default='langNames.db')

I believe python pkg-utils affords some functionality for finding the right place for these things. Although, I would only want it to default to that path in an actual package deployment, not a source deployment.