Version 4.3.3

• Add pyteomics.electrochem.gravy (#9).

• Fixes and improvements in pyteomics.pepxml.roc_curve (#10).

• Changes in guessing behavior of read functions.

  In modules that implement indexing parsers for non-XML formats (MGF, FASTA, PEFF, ms1/ms2),
  when a parser is instantiated using read, the parser class to instantiate is guessed
  based on the mode of the file object passed to read (text or binary).

  With some file-like objects, mode cannot be easily deduced without consuming some of the data.
  You will now see more warnings in case use_index is not explicitly passed to read and reading mode is not obvious.
  There will also be warnings if use_index is specified but the file is opened in the wrong mode.
  To avoid all of this, you are encouraged to instantiate parser classes directly,
  or explicitly specify use_index to read in all corner cases.