re-version as 2.0.0

bug: https://issues.apache.org/jira/browse/CB-288

Just updated the version number of weinre from 1.7.0 to 2.0.0
diff --git a/weinre.build/build.properties b/weinre.build/build.properties
index a1fe6d5..b4f629a 100644
--- a/weinre.build/build.properties
+++ b/weinre.build/build.properties
@@ -21,7 +21,7 @@
 # weinre version
 #-----------------------------------------------------------
 
-WEINRE_VERSION: 1.7.0-pre
+WEINRE_VERSION: 2.0.0-pre
 
 #-----------------------------------------------------------
 # some common locations used in the ant scripts