Merge pull request #1289 from bmeshell/master

add version history page for PFE

Author: lmckenzi

xml/FHIR-us-pacio-pfe.xml

@@ -254,4 +254,5 @@
 <page key="structured_data_capture" name="Structured Data Capture"/>
 <page key="toc" name="Table of Contents"/>
 <page key="underlying_technologies" name="Underlying Technologies"/>
+<page key="version_history" name="Version History"/>
 </specification>