Fix for Issue #27

Add a conditional check for the file 1100tags.txt.  If it doesn't exist in the user
defined data directory, then default to the Pgm_root/data directory.
Update debug to note I2CS devices as potential sources of error

An I2CS device will respond with a NACK if you try and control it with the PLM
before it is linked as a responder.  Add a note to the debug log regarding this.
Partial Fix for #28

Based on Marc Merlin's code, I confirmed that I received the same error.  More issues with #28 still need to be solved.
Fix typos in AllLinkDatabase

These are likely causing some unnoticed error.
Merge remote-tracking branch 'upstream/master'

Clean up conflicts in AllLinkDatabase.pm.  I had uded more concise languge, but verbose is likely easier to read.

Conflicts:
	lib/Insteon/AllLinkDatabase.pm