Include stdout and stderr for debugging
Test error inclusion
Skip requests that are not pickmed when processed

Due to processing delays, by the time some pickmes are processed they can have
been depickmed, merged into the deploy branch or otherwise no longer in the
pickme state.

To avoid extra work, only process pickmes that are pickmes at the time of the
checks.
Merge pull request #100 from rschlaikjer/include-stderr-in-conflict-details

Include stdout and stderr for debugging
Merge pull request #101 from rschlaikjer/only-test-pickmes

Skip requests that are not pickmed when processed

During the delay between pickme and actual pickme processing, pickme's can no longer be valid.
Release 0.3.6

 BUG FIXES

 * Track worker pids (rschlaikjer, #98)
 * Skip pickmes in conlfict detection if they are no longer valid (rschlaikjer, #101)

 IMPROVEMENTS

 * Include stdout on conflict-master pickmes (rschlaikjer, #100)

 PERFORMANCE TWEAKS

 * Merge conflict detection uses multiple threads (rschlaikjer, #99)