`bundle install` command on fedora 21 was failing
with following message:
Your Gemfile has no gem server sources. If you need
gems that are not already on your machine, add a line
like this to your Gemfile:
source 'https://rubygems.org'
After adding that line it worked again.
https://bugzilla.gnome.org/show_bug.cgi?id=746205
This subdirectory gets in the way when integrating the inspector
build more fully with GTK+, and does not really add anything.
Just move everything one level up.