memleak fix, new logging, major input refactor and more

• BREAKING: switch to logrus for logging. #317, #326
  If you were previously using log level notice, you should now use info.
  See logging docs for more info on the log levels.
• IMPORTANT: refactor release process, docker tags and package repo. #330, #331
  see installation docs
• fix memory leak when connections should be closed. #259, #329
• Rewrite of the inputs. pickle, tcp, udp and data reading.
  They are now plugins, handle errors better, and support timeouts.
  #286, #287, #301, #303, #306, #313, #316, #318, #320
• simplify default configs, bump default stats interval, improve config docs. #276
• Make StorageResolution for CloudWatch routes configurable. #275
• re-organize docs into separate pages. #277
• track timestamps coming in to aggregators and being too old. #280
• include sysv init file in centos6/rhel6 rpm to accommodate aws images. #283
• rewriter: support "not" clause + DRY constructor. #284
• fix connection pooling for grafanaNet route. #289
• Fix sslVerify default=true for grafanaNet route using new syntax. #291
• add support for tag appendix validation. make validation inline with grafanaNet. #292
• add request logging for admin interface. #297
• make max_procs setting optional, honor GOMAXPROCS env var. #309
• switch to circleci 2.0. #294
• switch from govendor to dep. #310