Typography, error message and description

- french typography (apostrophes, guillemets);
- error message if using a free account (which can't download the newspaper);
- description.
New icon for Le Monde: Edition abonnés
Merge pull request #55 from sylvaindurand/patch-1

Update Le Monde: Typography, error message and description
Merge pull request #56 from sylvaindurand/master

New icon for Le Monde: Edition abonnés recipe
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Merge branch 'master' of github.com:kovidgoyal/calibre
newdb: Handle duplicate values when setting many-many fields

Fixes an error when merging book records that have the same tags.
newdb: Fix true/false searches on numeric columns
Plugin updater dialog: Use index names

Use index names as the key for plugins rather than names from the
plugin zip file, as deprecated plugins sometimes have the same name in
the zip file, but different names in the index.
A lot more verbose lock debugging
Remove the unused RecordLock class
Move lock testing into the main test suite
newdb: Fix move_library() broken on case-insenstive file systems

get_top_level_move_items() was not checking that the items it returned
actually existed on case-insensitive file systems. This bug is actually
present in olddb as well.
Fix refresh() test failling on OS X because of file system resolution
Fix test failures due to file locking on windows
Fix test failure on windows because of slowness
Another test fix for windows
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Ensure the recycle bin is not used while running tests
newdb: More efficient deleteing of multiple books