(no-ticket) Zeus documentation.

Change-Id: I2f082e26ecfdb80c0bdd2ced41ab6e05562cd518
(no-ticket) Zeus grading skeleton

Change-Id: I9fe6b0f47e350630c0f2fd8576b63695af5d84cb
(no-ticket) ZeusServer implementation.

Change-Id: I5fff2542526230ed180bc4966e1eadb9639420cf
(no-ticket) Zeus: testrun views

Change-Id: I877d1f6dda0e8f64945f6824ef5f0037f8a680a1
(no-ticket) Zeus: Handlers tests

Change-Id: Ic37e4ca3a869d129797b6f6b5d8ca747ccb49916
(no-ticket) Zeus: update tests set while processing results

Change-Id: I7b636d09197232b43b014ab6c6897e907b9e281a
(no-ticket): Zeus bugfixes

Change-Id: I3983cf0c22bf21d6ad7cabbd6769a2586d0e70af