[ffwizard] freifunk-berlin/firmware#58 check user input

user gets an error message if he enters an ip instead of an ip
range
[ffwizard] freifunk-berlin/firmware#58 updated help text

added an example how to enter ap address range correctly
Merge branch 'master' into fixWirelessAPConfig

Conflicts:
	utils/luci-app-ffwizard-berlin/luasrc/model/cbi/freifunk/assistent/wireless.lua
added some spaces
Merge branch 'fixWirelessAPConfig'

Conflicts:
	utils/luci-app-ffwizard-berlin/luasrc/model/cbi/freifunk/assistent/wireless.lua