New version of the cassandra check
Remove some unused imports
Cassandra and Tomcat check using new JMX Connector and Checks.d Interface
Add the ActiveMQ and Solr jmx check using the new connector
Add the basic jmx check.d using the new jmx connector. \n Remove some unused imports
Allow old style conf compatibility + custom JMX domains and beans support for bazaarvoice
Add 'device' support for backward compatibility
Add metric name aliasing for jmx check 
Rewrite jmx checks to use new checks.d Checks
cache the metric params
Add some comments
Change the travels file in order to make pass the tests. import simplejson if it cans, json or minjson otherwise
the jmx test should not be that strict
Remove old style jmx check
remove a logging line used for debugging
FIx jmx tests
Add more memcached metrics: get_hit_percent, fill_percent, avg_item_size
issues/282: fixups for review comments

- Avoid using `%` for string formatting in log messages when this would
  force formatting for logs which aren't going to be printed.
- Avoid catching throwables not derived from Exception
- Avoid logging on ZeroDivisionError
Move the white/black list to the config files, creates an easier way to choose which metric to send or not
Set correct config file examples
Remove some unused stuff