changed record format of btree to (1) not to rely on a length indicator in serialized fields and (2) deal with nulls

git-svn-id: https://hyracks.googlecode.com/svn/trunk@113 123451ca-8445-de46-9d55-352943316053
37 files changed
tree: fff0a93bf9d91bebc5811d5fe6e1d5dea58c69f2
  1. hyracks/