usermanual: update on the watermark module

and a few further fixes
lua : huge rework of the type API

this is needed to be able to use introspection

This should have no impact on the user
Italian translation updated
Merge pull request #598 from bartokk/master

Italian translation updated
Add support for the Pentax K100D Super and *ist D
Add a new decoder for the Leaf MOS format
Add the info for the Leaf Aptus 22
Blacklist the MOS format instead of 3FR
Don't leak memory with the XMP parsing
Guard against empty XMP sections
Add the basic DCR decoder
Add the definitions for the DCS Pro SLR
Initial integration of the dcraw code
Try and fix the decoder
Check that the compression is 65000
lua : fix runaway stacks causing crashes
Merge pull request #599 from pedrocr/rawspeed-pentax-support

Add support for the Pentax K100D Super and *ist D
Merge pull request #600 from pedrocr/rawspeed-leaf-support

Rawspeed support for the Leaf MOS format
watermark: more intuitive alignment for rotated watermarks
Improving the adaptation of the dcraw code