Increment the "path" earlier.

This was building broken paths like "/home/foo/~/bar".  Bug found by
Maarten de Vries.

Use Path::FromUTF8() for the g_get_home_dir() return value instead of
assuming it's already FS charset.

For callers that already have a Tag instance.

Methods BeginAdd() and EndAdd() have been replaced by class
TagBuilder.

Obsoletes Tag::BeginAdd() and the complicated "bulk add" code.

This is not a C++ class and must not be copied.

Move to TagSettings.c and use C99 initializers.

Allow using the Tag.cxx library without the Config library.

Migrate the remaining callers to FatalError().

Replaces struct playlist_provider.

Use only ConfigData.hxx in plugin sources to reduce header
dependencies.

Reduce header dependencies.

Reduces header dependencies.

Replaces GLib's GError.

Remove all #ifdefs.  Old versions of libpulse are not being tested,
and thus I'm removing support.