Apply first pass of retheming jQuery UI theme. 

- Revert jQuery css file to unmodified state.
- Separate out overrides into separate css file for easier future updates with jQuery UI's themeroller.
Adjust various button margins.
Apply new hover styles outside of widgets and dialogs.

- Fix bullets appearing on pagination in Firefox.
- Add jQuery UI icon set that matches the blue link color.
Apply new hover styles outside of widgets and dialogs.

- Fix bullets appearing on pagination in Firefox.
- Add jQuery UI icon set that matches the blue link color.
remove files added by bad build script
update libZotero
make child notes attached to items actual Zotero.Item
update trashing requests and dialog widths

 - trash/untrash/delete requests now use multi-item operations from v2 API
 - widths on cite items dialog box are slightly improved. Still a problem that
after closing first dialog, freshly rendered interior elements have 0 width
when we check.
remove remaining use of jQuery .live

Preparing for jQuery >= 1.9
Most remaining uses were for mobile events. For now the functionality is just
exactly duplicated with J(document) binds, preserving the poor performance.
This can be done better, but the jquerymobile DOM management makes it more
complex.
add pref to prefer itemKey in url to itemsList form

closes #16
don't use old Zotero.Item dataFields in template
destroy dialogs instead of closing them
make DOI a link in item details
Merge pull request #24 from kimisgold/master

Re-theme jQuery UI