stubbed out popen
merge master
adds time limit check and changes way submission evaluators are launched
file written to properly now, exception thrown after write
adds phase.execution_time_limit which applies to both prediction and scoring program
adds check for exit code, just in case
merged
adds migration, and i forgot migration for dataset cascading delete...
Merge pull request #483 from Tivix/feature/limit-execution-time

Limits execution time