added section troubleshooting

Added different browser shortcuts to reload the ressource from the
server instead from the cache.
README.md: link to CHANGELOG.
examples/login
HttpClient do not require exchange.rule to be non-null
updated example READMEs: replaced 'Router' by 'ESB'
HttpClient do not require exchange.rule to be non-null
upgraded runtime dependency on HttpClient to 4, Guava to 13
lifted several dependencies to their latest version
fixed compiler warnings
added log4j.properties to cli/src/test/resources to silence test error messages
release Http* objects (Apache HTTP Client) when done
fixed URLUtil.getPathQuery
adminConsole: option to change the log4j level and config on the fly
JBoss AS 7 deployment
replaced more libraries by module dependencies
JBoss sar: exclude libraries from .sar which are module dependencies
Fixes #48
new soap-proxy example added
removed experimental CouchDB interceptor
infrastructure for generating spring XSD from annotations