Necessary TODOs

[mwaskom]

This is a list of things that need to be implemented before visigoth is fully functional:

• [x] Proper selection of server address (2ea26a5)
• [x] Show a summary of performance at the end of each run (1b0467a)
• [x] Wait a given amount of time between trigger and experiment (3850480)
• [x] Wait at the end of the run until a given amount of total time has elapsed (01a6501)
• [x] Start experiment off external trigger key (66fe7f3)