Don't assume that introspection utils are already available in the REPL server

[cemerick]

With the addition of a :connect option to lein repl, connecting to an nREPL server started by other means (e.g. by a running application, counterclockwise, whatever) results in this error upon connecting:

FileNotFoundException Could not locate complete/core__init.class or complete/core.clj on classpath:   clojure.lang.RT.load (RT.java:430)

The REPL remains usable, but obviously without completion and other introspection utils. Ideally, reply should check to see if the necessary namespaces are available immediately upon connecting; if not, load them and proceed.

[trptcolin]

Ah, interesting, that seems like a nice solution.

@technomancy and I were talking yesterday about some profiles-based options to avoid stuff like this with the clojuredocs/clj-http dependencies in projects with conflicting versions - I wonder if this has potential to be a path towards removing that issue as well...

[trptcolin]

@cemerick What was the project you mentioned awhile back that sends the namespaces over the wire to load them up? Was it CCW? Swank?

For the time being, we'll just no-op completion attempts when complete.core isn't available.

[trptcolin]

I'm going to close this and open a new one as a feature to figure out throwing the whole complete.core ns across.