Start work on saved searches dialog
Ordering, editing, adding, removing for saved searches
Fix for lp:1294983. Added test for bools_are_tristate when processing rules for bool fields.
Fix #1294983 [Tristate Columns not interpreted properly for EPUB Catalog creation](https://bugs.launchpad.net/calibre/+bug/1294983)

Merge branch 'master' of https://github.com/GRiker/calibre