No need to rename glue-dlls. - already have the correct name
Use Gtk# 3 specific reg keys to enable side-by-side version install

I've renamed the registry keys to allow painless side-by-side installation of different Gtk# versions (v2 and v3). This
is actually a bug in the current version of Gtk#2/3, but I haven't found a bug report about it. If Gtk# 2 and Gtk# 3
were installed side-by-side, they would both refer to the same reg key (GtkSharp). If either one of them had been
uninstalled, it removed the reg key leaving the other installation somewhat crippled.
Improve GLib.Application API a bit
Merge branch 'msi-improvements' into pmaster
Merge branch 'glib-application-API-improvements' into pmaster
Merge branch 'add-assembly-metadata-class' into pmaster