Move to version 2.0

Author: atoulme

build.gradle

@@ -42,7 +42,7 @@ description = 'A set of libraries and other tools to aid development of blockcha
 //////
 // Version numbering
 
-def versionNumber = '1.5.0'
+def versionNumber = '2.0.0'
 def buildVersion = versionNumber + buildTag(buildRelease)
 
 static String buildTag(releaseBuild) {