Implment output processing

- Implemented result processor infrastructured
- Corrected some status tracking issues (differed between states
  and output).
- Added "csv" and "status" result processors (these will be the default
  enabled).

wa/__init__.py

@@ -1,6 +1,7 @@
 from wa.framework import pluginloader, log, signal
 from wa.framework.command import Command
 from wa.framework.configuration import settings
+from wa.framework.configuration.core import Status
 from wa.framework.exception import HostError, JobError, InstrumentError, ConfigError
 from wa.framework.exception import (ResultProcessorError, ResourceError,
                                     CommandError, ToolError)
@@ -10,4 +11,5 @@ from wa.framework.exception import WorkerThreadError, PluginLoaderError
 from wa.framework.instrumentation import (Instrument, very_slow, slow, normal, fast,
                                           very_fast)
 from wa.framework.plugin import Plugin, Parameter
+from wa.framework.processor import ResultProcessor
 from wa.framework.workload import Workload