Reorg to use the same flow --from vim command

[iamdustan]

Idk what the --from {editor} command is intended to do, but this reorganization allows for more commands to share in the initial flow startup process and get the --from vim command.

The biggest change in here is because the jump-to-def format with and without that command changes.

Output without --from:
/Users/iamdustan/projects/project/app.js:5:3,5:33

Output with --from vim:
File "/Users/dkasten/projects/w2g-web/client/root-action-creators.js", line 5, characters 3-33

[mroch]

as you noticed, --from vim and --from emacs change the error format into something that vim and emacs have built-in support for.

maintaining special error printers kind of drives me nuts though :) i would love if it was possible for all clients to consume --json (#15)

[iamdustan]

I’m learning all sorts of vimscripty-ness these past two days :)

I started looking into the --json bit. Hope to revisit it soon.

[mroch]

maybe the vim-specific format isn't even necessary, since it's got a custom format in s:flow_errorformat.

what if you changed s:flow_errorformat to support the standard output (with no --from) instead? which format seems easier to parse?

[mroch]

i guess you'd probably need --old-output-format instead, so that's probably not an improvement... trading one special param for another.