[x] support temperature-difference from the tmd bash-version by reading the last line of temperatures in file "tm_720.csv" in the order "innen", "aussen" (for this sequence to work, "lampe" needs local access to this file. file location will be the default $HOME/public_html/tm/tm_720.csv)
later:
[ ] support the RESTful-api of the new tmd-version to get temperature-difference
sequence start with key "m" (mood light)
for prerelease of version 1.2.0 (1.1.1):
$HOME/public_html/tm/tm_720.csv
)later: