Correct punctuation in contact information

Author: pgleeson

README.md

@@ -2,7 +2,7 @@
 
 A framework for building cortical network models on OSB in NeuroML format.
 
-In development, subject to change without notice... Contact P Gleeson for more details.
+In development, subject to change without notice... Contact P. Gleeson for more details.
 
 **Note: much of this functionality has been replaced by: https://github.com/NeuroML/NeuroMLlite**