actors.cpp: Change demo camera path following behaviour to search for locators based on a hitag channel to avoid locator lotag contention.
Now, destination and subject locators should be assigned one hitag channel.  Destination locators will be visited starting from lotag 0 and counting upward.
Subject locators can have any lotag within the same hitag channel, and may also be a destination if the lotag is not separated from the destination locator ids.
Destination locators must now specify their subject locator in their owner field by lotag.

From-SVN: r7739