allow non-strict mode for reading replaygain tags, to fallback to track tags if album tags are not available and vice versa

fix minor bug printing unknown aiff subchunks (SF bug #1267476: https://sourceforge.net/tracker/index.php?func=detail&aid=1267476&group_id=13478&atid=113478)

fix bug in --sector-align where appended samples did not completely contain silence (SF bug #1237707: https://sourceforge.net/tracker/index.php?func=detail&aid=1237707&group_id=13478&atid=113478).  also, fix bugs with --sector-align on raw files

add support for encoding from non-compressed AIFF-C (SF bug #1090933: https://sourceforge.net/tracker/?func=detail&atid=113478&aid=1090933&group_id=13478)

fix bug in cuesheet parsing where it would return an error if the last line of the cuesheet did not end with a newline

change the navbar css by integrating the separators into it.  IE was treating the empty separator div's differently than everything else and putting space in them

libFLAC++: all metadata object operator=() funcs now return *this; add Metadata::*::assign() and FLAC::Metadata::get_tags()

add vorbiscomment validation functions to format.c and test code; validate name part of vorbiscomment in metadata and metadata++ interfaces

additions to metadata object api: more vorbiscomment functions, trailing-null on vorbis comment field values enforced everywhere

add changelog and links to navigation bar, move links section from main page sidebar to its own page