Optional delete from table before Sqoop export
Initial work on Execution.
Adds customer pipeline using execution monad.
upload returns list of files copied to hdfs
upload execution doesn't execute synchronously
Remove extra resolver added to maestro because we couldn't update uniform

This closes #225
core tests fail occasionally when run in parallel
take Configuration out of upload execution api
WIP first working ViewExecutionSpec test
WIP ViewExecutionSpec tests, with failing viewHive zip test
WIP fixing ViewExecution hive tests to use HiveSupport, still doesn't fix viewHive zip test
WIP add in fact tests to failing viewHive zip test, we'll want them eventually anyway
fix compile error in example project
WIP minor modifications to view execution tests
added scaladoc for controlPattern upload parameters
add customUpload and change upload return type to single out empty file lists
added tests for upload execution
add all load methods to LoadExecution