Italian translation updated
Update French translation.
Merge pull request #556 from bartokk/master

Italian translation updated
Lens IOP: add autodetection, based on fact "did user or did not changed anything in GUI from autodetected values"
Merge pull request #548 from LebedevRI/lens-autodetection

Lens IOP: add autodetection
Some more GUI fixes

- Try to keep background grids crisp in custom widgets.
- Put a subdued dt logo into the empty widget of zone system.
Prevent crash on startup. Preliminary fix! I still need to actually reproduce original crash!
https://github.com/darktable-org/darktable/pull/548#issuecomment-42763922
Merge pull request #557 from Terrycloth/clarifying-text-in-user-manual

my first few edits to the user manual.
usermanual: more on tagging (thanks to Christian Kanzian)
Revert "Prevent crash on startup. Preliminary fix! I still need to actually reproduce original crash!"

This reverts commit f6129f8a352dd99037d98d5f8c51680ffb889ada.
Preset update infrastructure: some modules(e.g. lens iop) depend on global data in reload_defaults()

module->init(module); is already called by dt_iop_load_module_by_so()
Lens IOP: prevent crashes in legacy presets update infrastructure
edited awkward phrasing. changed 'local copies' to 'cache locally'.

At least on my computer (running Fedora Linux and Darktable 1.4.2), the
button in Selected Images panel in lighttable mode is labeled 'cache
locally', not 'local copies', so I changed the reference in the manual
page here to be more consistent.