Merge pull request #1110 from RosettaCommons/vmullig/fix_lei_app
Turning on one of Lei's pilot apps.
This pilot app is used, and should be compiled by default so that compilation can be tested. Its main() function has everything in a try/catch block, so it should be good to go, but I'll run it on the test server first.
Correction: there were some owning pointer issues that were preventing compilation on Mac/clang. I've fixed these, now.