i18n: Chinese translation is done by too many people to name them all, just use 'by Chinese Translators'

libs/json: Fix a typo and a logic error in json.lua to make luci.json.encode() work like expected (#220)

modules/freifunk: Show remote update in menu only when /usr/sbin/remote-update from the package remote-update is present (#160)

libs/web: explicitely cast input value of %m pattern to float in order to avoid throwing an exception in toFixed() with very low values