Adds default values for stratum server status + shows them as offline if no cached value is pulled
Adds profitability column to stratum status
Update translations
Quick hack to add chain profit to server_status cache
Add a couple lines to the example.toml config
fix "gunicorn error 104 Connection reset by peer"

I often encounter https://github.com/benoitc/gunicorn/issues/630, and update gunicorn to 19.1.1 can solve this error.
Merge pull request #165 from sbwdlihao/patch-5

fix "gunicorn error 104 Connection reset by peer"
Add POT, AUR, NVC, TAG to defaults.toml
Patch GBT call in scheduler to work with older clients (AUR)
merge conflict
merge from simplecrypto