Vertical Speed & User Homepage

Few improvements:

• On the user homepage the date of the track is shown instead of the upload date;
• It's possible to change or set the track date in the info panel on the right;
• In flying mode the controls disappears;
• On the analyze page there is a new graph, called "Vertical Speed" (height gain per hour); this graph is avalaible for tracks that have both time and elevation;
  
• We removed the timeout that was preventing slow uploads to finish correctly;
• We did various style improvements;

Here an example of the vertical speed graph

Smoother Flight + ATV

We improved the flight algo, now it's less "bumpy".
Our approach in case of obstacles between the cameraman and the little yellow guy was too aggressive. Now, the cameraman takes it easy and moves quickly only when the yellow guy is completely lost, otherwise he moves slowly.

Added the ATV aka All Terrains Vehicle to the activities. If you need other activities, just ask.

IMPORTANT BUG FIXED: In the last days it was impossible to sign up because of a bug, now it works again. Sorry for the inconvenience and thanks to pierrega who reported it.

SRTM Data

We improved the SRTM data feature for tracks without elevation data or elevation set to zero. In such cases gpsfly will attempt to fill the elevation using publicly available SRTM data. There is an example: http://gpsfly.org/a/343. We fetch the data as needed, so for tracks in regions where there is no data yet, the upload may be a little bit slower.