Updating readme to mention specific script versions and their Cascade…

… compatibility

README.md

@@ -6,7 +6,30 @@ intelligent copying of assets.
 
 This script copies assets between sites in Cascade, between
 sites and the Global area, and from one instance of Cascade to another. 
-You can recursively copy folders or containers or copy entire sites. 
+You can recursively copy folders or containers or copy entire sites.
+
+Version Compatibility and Working with other Cascade versions:
+==============================================================
+
+This script (v1.6) works with Cascade 6.7, 6.8 and 6.10.
+
+Previous versions include:
+
+- [v1.4](https://github.com/hannonhill/Cascade-to-Cascade-Migration-Scripts/zipball/v1.4) is compatible with Cascade 6.7.x
+- [v1.2](https://github.com/hannonhill/Cascade-to-Cascade-Migration-Scripts/zipball/v1.2) is compatible with Cascade 6.4.x
+
+There are a few places in the code where we list all asset types or 
+container types. When Hannon Hill updates Cascade web services, we
+need to update these lists. 
+
+For example, in Cascade 6.7 structuredDataDefinition was renamed to
+dataDefinition and xhtmlBlock was renamed to xhtmlDataDefinitionBlock.
+
+If you'd like to get this script working with a new version of Cascade,
+the first place to look is Hannon Hill's web services
+change log:
+
+http://www.hannonhill.com/kb/Web-Services/Web%20Services%20Changelog/
 
 Installation:
 =============
@@ -140,25 +163,4 @@ copy them as well.
 
 In Cascade, when you copy assets, they inherit access rights from
 their new parent folder.  When you copy assets with this script, it copies
-their access rights as well.
-
-Working with other Cascade versions:
-====================================
-
-This script works with Cascade 6.7, 6.8 and 6.10.
-
-An older version that works with Cascade 6.4 is also available.
-
-There are a few places in the code where we list all asset types or 
-container types. When Hannon Hill updates Cascade web services, we
-need to update these lists. 
-
-For example, in Cascade 6.7 structuredDataDefinition was renamed to
-dataDefinition and xhtmlBlock was renamed to xhtmlDataDefinitionBlock.
-
-If you'd like to get this script working with a new version of Cascade,
-the first place to look is Hannon Hill's web services
-change log:
-
-http://www.hannonhill.com/kb/Web-Services/Web%20Services%20Changelog/
-
+their access rights as well.