update README to expand a bit on the recent work
update README to expand a bit on the recent work

guardianproject/libsqlfs,eighthave/libsqlfs,eighthave/libsqlfs,eighthave/libsqlfs,guardianproject/libsqlfs,spthaolt/libsqlfs,eighthave/libsqlfs,spthaolt/libsqlfs,eighthave/libsqlfs,guardianproject/libsqlfs,guardianproject/libsqlfs,guardianproject/libsqlfs,spthaolt/libsqlfs,spthaolt/libsqlfs,spthaolt/libsqlfs