Made scoped_channel_value's base type accessible to users.

svn path=/trunk/boost/gil/; revision=64259
Code changes to suppress some compiler warnings when using scoped_channel_value.

svn path=/trunk/boost/gil/; revision=64598
Enables reading multi-page tiff.

svn path=/trunk/boost/gil/; revision=64600
Allow to compile with recent libpng version ( 1.4 and greater ).

svn path=/trunk/boost/gil/; revision=64602
Allow for image creating with non-pixel types, like int or float, that satisfy the regular type concept.

svn path=/trunk/boost/gil/; revision=64621
Corrected bug with dealing with cross byte pixel values. See updated test code in pixel_iterator.cpp.

svn path=/trunk/boost/gil/; revision=65171
Added test code to make sure cross byte pixel values work correctly. See comments.

svn path=/trunk/libs/gil/; revision=65173
Disabled asserts since test code isn't working for big endian machines.

svn path=/trunk/libs/gil/; revision=65200
Fixed a problem when compiling with gcc.

svn path=/trunk/boost/gil/; revision=65362
Changes suppress compiler warnings when dealing with on-the-edge bit_aligned images, for instance rgb31 or rgb63.

svn path=/trunk/boost/gil/; revision=65911
Introducing base_channel_type metafunction which helps to avoid useless casting between integral data types. For older compilers it also reduces warnings about those castings operations.

svn path=/trunk/boost/gil/; revision=66416
Apply patch for Lubomir; Refs #4919

svn path=/trunk/boost/gil/; revision=82092
#7970

svn path=/trunk/boost/gil/; revision=82702
#6681

svn path=/trunk/boost/gil/; revision=82703
#6681

svn path=/trunk/boost/gil/; revision=82704
Added missing header file.

svn path=/trunk/boost/gil/; revision=82705
The last fix produces a compiler with Visual Studio 2010.

See ticket 7970.

svn path=/trunk/boost/gil/; revision=82745
#7920

svn path=/trunk/boost/gil/; revision=82755
The tests and documentations for toolbox extension.

svn path=/trunk/libs/gil/; revision=82767
Toolbox tests and documentation.

svn path=/trunk/libs/gil/; revision=82768