obscur boolean switches

there are some non-trivial boolean switches i had to add to make all the tests and the komodo.nu application work

• field::split_data_into_field_elements defines one_more which is set to
  • false in fec::tests::decoding_template
  • true in fec::decode
  • true in fec::Shard::mul and fec::Shard::combine
  • false in field::tests::split_data_template
  • false in encode
  • true in verify
  • removed in !12 (merged)
• field::merge_elements_into_bytes defines one_less which is set to
  • false in prove
  • false in fec::Shard::mul and fec::Shard::combine
  • false in fec::tests::decoding_template
  • true in fec::decode
  • removed in !12 (merged)
• fec::decode defines transpose which is set to
  • false in fec::tests::decoding_template
  • true in tests::end_to_end_template
  • true in main.rs
  • removed in !26 (merged)