Added feature: LogToSplunkPlugin now attempts to reconnect to splunk server on splunk dc

LogToSplunkPlugin now attempts to reconnect to splunk server if splunk
server drops.
Time between attempts to reconnect can be set in config.

Added feature:
The specification of wood types (e.g. spruce, birch) can be turned
off so that all wood logs etc. just turn up as generic 'wood log' or
'wood stairs' in splunk.  This can be set in the config file. 

Known issues:
Design is currently only meant for one instance of splunk - if one
instance of splunk goes down, all data being sent to splunk servers is
put on hold until all connections are reestablished.