Implemented natural sort so that revisions are sorted properly.
Implemented natural sort so that revisions are sorted properly.

Current: TP-Link WR-841-ND v10 v3 v5 v7 v8 v9
Patched: TP-Link WR-841-ND v3 v5 v7 v8 v9 v10

freifunk-darmstadt/ffda-firmware-splash,freifunk-darmstadt/ffda-firmware-splash