Log Message:
Update to 1.4.4.

The patch to help serial garmins with prolific adaptors is retained,
but it's perhaps a bit dicey because upstream code has changed a bit.

Upstream NEWS content from web pages:

1.4.4:

  Add MotoActiv format. Thank you, Dan Brown.
  Kris Beevers contributes Lowrance USR v4 support.
  Allow EXIF to represent altitude below MSL.
  Allow reading known invalid (sigh) data in NMEA, such as that
  written by Canon Camera/GPS devices, probably including:
      Canon GPS shoes
	  GP-E1
	  GP-E2
      Powershot models with GPS capabilities
	  S100
	  SX260
	  HS D20
  Enhance Garmin Fit support for latest firmware.
  Skytraq fixes.
  Steve Eckert adds line styling to the National Geographic TPO3 reader.
  Erik Krause improves German translations.
  OS X Mountain Lion fixes.

1.4.3 beta:

  Fix translations for GUI on Windows. German, Italian, Hungarian,
  Russian, and a few others should now work. If your language is there,
  please contribute a translation. It's easy and doesn't require you to
  program.
  A new writer for geocaches in KML (Google Earth) provide better
  visualizations of high-density areas.
  Many KML improvements including validation fixes, aviations units,
  fixes for min/max alt.
  Adds iblue757 GPS support.
  Add support for Holux M-1200E GPS.
  Add the Minihomer variant of Skytraq.
  Add FlySight GPS support.
  Add Garmin FIT support.
  Add Land Air Sea format for GPS Tracking Key Pro.
  Many Navicache improvements.
  Fixes to track filter to not mangle tracks recorded at low speed when
  segement filter is applied.