Patch from Warren Layton to add a "Export to RefWorks" link for bookbags.

Patch from Warren Layton to add a "Export to RefWorks" link for bookbags.

The link only appears if the user's bookbag is shared (if it's not
shared, Supercat feeds for the bookbag won't be visible to outside
world, including RefWorks). It appears under the "Shared" column
(right under "Yes (View) [RSS]").

Developer's Certificate of Origin 1.1

By making a contribution to this project, I certify that:

(a) The contribution was created in whole or in part by me and I
   have the right to submit it under the open source license
   indicated in the file; or

(b) The contribution is based upon previous work that, to the best
   of my knowledge, is covered under an appropriate open source
   license and I have the right under that license to submit that
   work with modifications, whether created in whole or in part
   by me, under the same open source license (unless I am
   permitted to submit under a different license), as indicated
   in the file; or

(c) The contribution was provided directly to me by some other
   person who certified (a), (b) or (c) and I have not modified
   it.

(d) I understand and agree that this project and the contribution
   are public and that a record of the contribution (including all
   personal information I submit with it, including my sign-off) is
   maintained indefinitely and may be redistributed consistent with
   this project or the open source license(s) involved.

Signed-off-by: Warren Layton
git-svn-id: svn://svn.open-ils.org/ILS/branches/rel_1_6@14477 dcc99617-32d9-48b4-a31d-7c20da2025e4