Updated the config file to reflect the package name change.

Author: mrsutherland

src/main/resources/plugins.config

@@ -5,4 +5,4 @@
 # If something like ("<arg>") is appended to the class name, the setup() method
 # will get that as arg parameter; otherwise arg is simply the empty string.
 
-File>Import, "XRM/TXRM/TXM", com.sutherland.michael.imagej.XRM_Reader
+File>Import, "XRM/TXRM/TXM", com.nullsquared.imagej.XRM_Reader