Retire FLAC__float and FLAC__double types

Usage of internal aliases for float and double do not provide
substantial value. For integer-only libs, the macro
FLAC__INTEGER_ONLY_LIBRARY is used in the appropriate places
already.

Also, adapt copyright messages to include 2016.

Signed-off-by: Erik de Castro Lopo <erikd@mega-nerd.com>
Closes: https://github.com/xiph/flac/pull/10
10 files changed