glyexp 0.14.2

Minor improvements and bug fixes

• The bundled real_experiment and real_experiment2 datasets now use the
  current glyrepr structure representation (#13).
• from_se() now accepts traitomics and traitproteomics experiment types
  from SummarizedExperiment metadata (#11).
• from_se() now errors when exp_type or non-others glycan_type is
  missing from both the function arguments and SummarizedExperiment metadata
  (#12).
• from_se() now preserves all SummarizedExperiment metadata fields when
  converting back to an experiment() object (#10).
• real_experiment and real_experiment2 now print their glyrepr columns
  correctly when loaded from the package (#9).