Filter out brackets in host resolution (i.e. [::1] -> ::1)

Via @vbmithr. Closes #8
Add a Conduit_xenstore which implements the Vchan model
update gitignore
Add vchan tests using the conduit interface
fix conduit.mirage dependencies
Sprinkle a little more debug into the conduit interface
Merge branch 'master' into gh-pages
sync ocamldoc