OpenMS support

[Arslan-Siraj]

I am trying to add OpenMS support for search engines (.idXML format).
Target to add OpenMS in Oktoberfest.
what I did?

• add openms.py (/spectrum_io/search_result)
  here is dependent pull request initiate OpenMS support spectrum_fundamentals#101

[Arslan-Siraj]

External library pyopenms will require.

[picciama]

Hi @Arslan-Siraj, also thank you here for your contribution. I would also need a unit test so please add it or send me a minimal example file so that I can write one.