[python] Remove unnecessary parentheses on if statements
[python] Fix rrdgen.py
[python] Use gmtime instead of localtime, fix blanking of sensors file on error
Change gmtime back, display timezone on web interface
[web] Prevent aliases containing :, close file when finished
[python] Add DS claiming and tiny owtg module
[python] Move some reusable code into owtg module
[detect_sensors] Use int() instead of split()
Write rrdupdate.py
Change folder to /opt/owtg
[rrdgen] Sets file permissions after creating database