Added initial support for showing the log messages in local or UTC time.
When messages are received, they are time-stamped with the exact UTC time. The message itself contains a time-stamp and this is also stored.
In the Preferences, you may now select whether you want the source time (e.g. the time of the sender system - if a different machine) or the local time and date.
You may optionally select to change any UTC times to be displayed in local time (note, all of the clever stuff is done by NodaTime).
Time and Date have now been split into separate columns with optional formatting for each. More formatting options can be added, please make suggestions.