GNOME Shell 3.8.2-1ubuntu2~raring1 (from GNOME3 PPA) is not installable in Raring due to broken dependencies. It depends on libpango-1.0-0 (>= 1.14.0) and libpangocairo-1.0-0 (>= 1.14.0), however, libpangocairo-1.0-0 (or any similarly named 'pangocairo' package) seems to be unavailable at all. As is libpango-1.0-0, since the actual libpango package in Raring is named 'libpango1.0-0' (without the hyphen between 'o' and '1'!). It's probably a typo.
Here's the actual output of commands:
# apt-get install gnome-shell:
The following packages have unmet dependencies:
gnome-shell : Depends: libpango-1.0-0 (>= 1.14.0) but it is not installable
Depends: libpangocairo-1.0-0 (>= 1.14.0) but it is not installable
# apt-get install libpango-1.0-0:
Package libpango-1.0-0 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'libpango-1.0-0' has no installation candidate
# apt-get install libpangocairo-1.0-0:
Package libpangocairo-1.0-0 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'libpangocairo-1.0-0' has no installation candidate
Status changed to 'Confirmed' because the bug affects multiple users.