* Docs generate to vm/doc/generated_doc/.
Pull some config stuff from shotgun.
Fix .depend.mf generation.
Updated .gitignore to allow .d files outside of shotgun.
* Selector and SendSite are not wired up to be used at runtime yet
Probes are disabled by default, see shotgun/vars.mk to enable them in your build on a DTrace compatible machine. Probe signatures are compatible with Joyent's Ruby probes, with the exception of the provider name (Rubinius). Example dtrace scripts and documentation forthcoming.