[FIX] setValidFormats_ mzid got obviously lost while one of the merges with develop during the MZID pull request
[FIX] added mzid support
[FORMAT,DOC] enabled mzid input, improved documentation
[INTERNAL] conversion from mzid: warn before converting; removed unnecessary 'std::' qualifiers
[FIX] fixed grammar of warning message
[FIX] fixed indentation of XML output
[FIX] fixed spelling of warning message
[FIX] fixed error/warning messages; removed unnecessary 'std::' qualifiers
[TEST] added tests for IDFileConverter mzid <-> idXML conversions
Merge pull request #1090 from hendrikweisser/fix-idfileconverter-mzid

Enable mzIdentML input in IDFileConverter
Merge pull request #1089 from mwalzer/fix/MZID

Fix/mzid