Trailing whitespace
Build documentation last
Whitespace
hydra-evaluator: Don't require $HYDRA_CONFIG
Use $c->config
Die tabs die
Remove trailing whitespace
Update .gitignore
Remove the logfile and logSize columns from the database

It's pointless to store these, since Nix knows where the logs are.
Also handle (in fact require) Nix's new log storage scheme.  Also some
cleanups in the build page.
Handle active build steps of aborted builds properly
Omit the small build status icon on the build page

It's kinda pointless next to the big-ass icon.