Merge pull request #2 from ntolstokulakov/master

bug fixes
performance fix: use map
small refactor in AttributeDataStorage.restoreReferences - split method
Merge branch 'master' of https://github.com/setronica-dev/ucs
remove depency from CompressedChaerSeq interface
fix data.length check for LongCharSeq
add Long5CharSequence, ... Long12CharSequence classes