QueryTool to support all regions

[GoogleCodeExporter]

QueryTool 1.2a supports only US and EU regions only. It would be nice if it 
could support Singapore region as well.

personally, i prefer to have an additional command line parameter to allow us 
to supple the end point url.

reference:
http://stackoverflow.com/questions/3911500/how-do-i-get-the-region-endpoints-fro
m-the-amazon-simpledb-api

Original issue reported on code.google.com by mingfai...@gmail.com on 23 Apr 2011 at 10:06