Error management in TrailPointsManager.
Added grade calculator in app delegate.
Speed up Register Entries text loading, and RecentRegisterEntries view.
Made mileage strings for waypoints, taking into account hiker mile, measurement units.
Waypoint sorting in WaypointsList fixed.
Elevation Profile no longer opens to wrong locations.
Photo Uploader shrinks photos to correct size.
TrailPointsManager can handle 0 point files.
Improved S3Downloader efficiency.
Cleaned NSLogs, added [CurrentGuideInfoManager hashTags]