add 2 subclasses of RuntimeException, one to be thrown when there is a mistake in the arguments for a job, and one to be thrown when something is not supported in the current mode. although runtime exceptions are typically not supposed to be caught/handled this allows for nicer error messages to the user if one of these 2 errors is thrown (for example this could be done in Tool, not yet implemented)
pass message for new RuntimeException subclasses into super constructor
Merge pull request #860 from tresata/feat-exceptions

add 2 subclasses of RuntimeException, one to be thrown when there is a m...
Fix small bug in Stats where custom groups for counters were ignored.
Merge pull request #866 from daisyzhou/develop

Fix small bug in Stats where custom groups for counters were ignored.
Update scald to more robustly look for scala lib jars
Fix whitespace per Ian's comments
Merge pull request #867 from twitter/jco/fix_travix_via_scald

Update scald to more robustly look for scala lib jars
Added implementation of PartitionSource with tests. Notes:

* For Cascading documentation on PartitionTaps, see: http://docs.cascading.org/cascading/2.5/userguide/html/ch08s07.html
* Implementation is very similar to existing TemplateSource
* User can pass in delimiter + pathFields, TemplateSource-style, OR a custom Partition. I've written tests for both
* Unlike a TemplateTap, a PartitionTap can be read from as well as written to. I haven't implemented this
* I wanted to add a flag to automatically discard the pathFields from the output tap prior to writing, discussed here: https://groups.google.com/forum/#!topic/cascading-user/w24BMQ6ZG10. Nobody replied so I've removed this functionality for now
Whoops, got path depth wrong. Always 1
Moved into correct folder path
Fix for:
[error] /home/travis/build/twitter/scalding/scalding-core/src/test/scala/com/twitter/scalding/PartitionSourceTest.scala:43: not found: value ???
14/05/01 23:31:51 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
[error] def toTuple(partition: String, tupleEntry: TupleEntry): Unit = ???
Added support for user to specify which fields they want to include in their TSV output
Upgraded cascading to 2.5.4, cascading jdbc to 2.5.2
Merge pull request #863 from snowplow/feature/partition-source

Added implementation of PartitionSource with tests
Merge pull request #868 from twitter/jco/upgrade_cascading_and_jdbc

Upgrade cascading to 2.5.4, cascading jdbc to 2.5.2