Bump version prior to packaging with Pyserial 2.5

inkscape_driver/eggbot.inx

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
   <_name>EggBot Control</_name>
-  <id>command.evilmadscientist.eggbot.rev263b1</id>
+  <id>command.evilmadscientist.eggbot.rev264b1</id>
   <dependency type="extension">org.inkscape.output.svg.inkscape</dependency>
   <dependency type="executable" location="extensions">eggbot.py</dependency>
   <dependency type="executable" location="extensions">inkex.py</dependency>
@@ -156,7 +156,7 @@ selected number, which can be up to 100.
       <_param name="instructions_general" type="description"
 	      xml:space="preserve">
 EggBot Control Inkscape extension 
-Release 2.6.3, dated 2015-11-12
+Release 2.6.4, dated 2015-12-27
 
 *EBB Firmware 1.96 or newer required for certain
  functions. 

inkscape_driver/eggbot.py

@@ -2,7 +2,7 @@
 # Part of the Eggbot driver for Inkscape
 # https://github.com/evil-mad/EggBot
 #
-# Version 2.6.3, dated 2015-11-12
+# Version 2.6.4, dated 2015-11-12
 # Tested with pyserial v 2.5.0 and v 2.7.0
 #
 # This program is free software; you can redistribute it and/or modify