Move VSFilter 2012 project files to their own folder
Move BaseClasses 2012 project files to their own folder
Add XySubFilter build for VS2012
Merge commit '3e75b4ecfe28df7999c50fbca59e6a90cea1a5ad' into xy_sub_filter_rc
Fix compilation problems in VS2012 debug builds
Fix log4cplus compilation in VS2012 properly.

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"Fix compilation with Visual Studio 2011.
[...]
configurator.cxx: Include <functional> for std::bind1st."

Source: https://github.com/wilx/log4cplus-trunk/commit/9a368665300bc095dcd3507d4426c5e21f35078d
Fix project filters descriptions consistently
Merge commit '286df316160a5e964252efbecaca39d38484df96' into xy_sub_filter_rc2
Merge commit '899cb8fc4890aedff92cfced6d6233ef545cb1f5' into xy_sub_filter_rc2
Merge commit '14f0116a2e098a269eedab50dfb389a7cade5947' into xy_sub_filter_rc2
Merge commit 'eeaa00c08a7519775c4b84191c44ea62013b517a' into xy_sub_filter_rc2
Merge commit '63770e0c2d59bec0dbc5db2f2f48b19d648eb888' into xy_sub_filter_rc2
Merge branch 'xy_sub_filter_rc' into xy_sub_filter_rc2
Added the small necessary changes to the VS2012 projects