[Issue #5] make hRaven hadoop 2.0 compatible
[Issue #15] Enabling parsing of 2.0 job history files without referring to 2.0 packages/jars
[Issue #15] fixing as per review suggestions
[Issue #15] updating some more formatting and javadoc comments
[Issue #5] Adding a mapping for hadoop 2.0 keys to hadoop 1.0 to be compatible, also formatting changes
[Issue #5] updating regex for job history file names in 2.0
[Issue #5] Creating enum class for Hadoop 2.0 record types and other review changes
resetting the formatting changes
[Issue #5] adding some more comments and correcting formatting
[Issue #5] modifying as per review suggestions for null checks and year in copy right, also adding in some more keys I saw in 2.0.5 history files
[Issue #5] Updating to work as a hadoop 1.0 compiled jar on a hadoop 2.0 cluster to process 2.0 job history files
[Issue #5] updating as per review suggestions
fixing  comments in unit tests
[Issue 35] fixing the task keys so that they are the same as 1.0 and other review changes
Merge pull request #18 from vrushalic/hadoop2.0

Integrate Hadoop2.0 job history support.
[Issue #19] Tweak down scanner caching when JobHistoryService.getFlowSeries() is called with a low limit
Merge pull request #20 from twitter/github-19_scannercaching

[Issue #19] Tweak down scanner caching in JobHistoryService.getFlowSeries()
[Issue #21] Aggregate per-job counters in a Flow
Counter objects should be immutable
Merge pull request #22 from twitter/flow_counters

[Issue #21] Aggregate per-job counters in a Flow