lib/datatables: Removed unused/commented code
map-click-handler.js: Avoid unnecessary array lookups
Airspace: update german airspace
import_airspcaes: match more airspace altitudes
import_airspaces: fix importing files with arbitrary file extensions
map-click-handler.js: make click event usable in ie8
Merge pull request #23 from Turbo87/elevation

Adding elevation data to the live tracking
style.css: add display: table-cell to 'show' button column

Fixes misalignment of row border lines
tracking/list: Show altitude GND if available
Merge remote-tracking branch 'tbl/master'
wip