Status bar doesn't update with filename when creating a new file

[yarbelk]

If i type

vigo some_file

the status line stays as

---------- unnamed (row,col) ----------------

even after writing to file

[yarbelk]

I think we should change up the SetStatus to construct the status from data that is stored rather than passed in.

template.New("status").Parse("{{ if Name }} {{Name}} {{else}} (new buffer} {{end}} {{ if Dirty }} [ * ] {{end}}")

or something. Part of this issue is that the setStatus runs on Editor, but save runs on buffer - which doesn't have an editor pointer so we can't update the status on save.

I'll see about doing this.