Upgrade to Spark 1.0.2 and sbt 0.13.5

Upgrade to latest release version of `Spark 1.0.2`.  All tests pass:

```
[info] Passed: Total 104, Failed 0, Errors 0, Passed 104
[success] Total time: 124 s, completed Aug 22, 2014 2:10:59 PM
radtech:spark-jobserver $ git status
```
lmk if there are any issues or concerns.

-Todd