`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
Since widgets subelements are now both widget childs and widget
classes, say .spinbutton.button and .spinbutton .button,
the linking logic needs to be adapted to be stricter with
child selectors. This fixes vertically linked spinbuttons.
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.
