Merge pull request #142 from Turbo87/i18n

Updated translations
AUTHORS: Updated translators list
helpers/country: Import cleanup
helpers/country: Fixed KeyError: u'ZH_HANT_TW'

Newer Babel versions seem to include the script in the output...
tracking/info: Removed iGlide from list of clients
tracking/info: Added "LiveTrack24 clients" section
Merge pull request #143 from Turbo87/tracking-info

Updated tracking client list
model/search: Fallback to whitespace splitting on shlex.split ValueError
test_search: Added more test cases for "broken" search strings
Merge pull request #144 from Turbo87/search-escaping

model/search: Fallback to whitespace splitting on shlex.split ValueError
api: Extracted common parse_location() function
api: Simplified MWP api output

.. also API output shouldn't use i18n functionalities!
api: Added wave_to_json() function
api: Added airspace_to_json() function
api: Use map() for JSON conversion
model/geo: Added to_wkt_element() method to Location class
model/geo: Added make_point() method
model/geo: Added optional srid parameter to to_wkt_element() method
model/airspace,waves: Use faster make_point() instead of to_wkt_element()
api: Import cleanup