Added menu items for shapefile and csv download
Work with dev API for testing
Hide shapefile-download-button if there are too...

... many measurements to export the track.
Fix for #192
Added empty hrefs so pointer symbol is shown
Update lang_de.php
"The enviroCar app": linked app to google play
include crossOriginKeyword in OSM layer init
remove grayscale JS hack / use bw-mapnick instead
add simple php proxy for access to OSM tiles
add simple php proxy - now with proxy files
adjust proxy configuration
static proxy URL
fix string concat
change CSV and SHP download to stable API endpoint
Merge pull request #207 from enviroCar/dev

Updates from dev