integrate with analysis server

[jmesserly]

... if DDC mode is enabled, its warnings/errors will then show up in the editor.

[bwilkerson]

We need a mechanism for enabling this in server. We now have an options file available to us; that might be a good short-term solution even if we decide we need something more later on.

We also need to implement the "strong" mode in analyzer. Neither piece sounds like too much work.

[jmesserly]

We also need to implement the "strong" mode in analyzer. Neither piece sounds like too much work.

yeah, good point. this issue is blocked on #239

[jmesserly]

fixed a file ago!

.analysis_options:

analyzer:
  strong-mode: true