Fix build target names

The component.json tells build tools to load ```lib/conduitjs.js```, but the gulp task builds ```lib/conduit.js```.  The subtle difference in naming breaks component builds.

This pull request renames the build targets to match the component.json.  I'm not sure if this is the right approach.  The alternative was to modify component.json to point to ```conduit.js```.  It's a difference of ```require("conduitjs")``` vs ```require("conduit")```.  I'm not sure which the intent was, but I'm trying to patch someone else's component and they're using ```require("conduitjs")``` because component.json dictated that.

This is a possible resolution for issue #5.