enforce submission requirements

[aflueckiger]

Check the submission files of participants before evaluating.

Rules for system response files:

• files must be in UTF-8, tsv encoded (.tsv extension), with annotations in IOB format.
• files need to contain all content item lines and empty lines in the order of the original input file.
• files must comply with the following naming convention: TEAMNAME_TASKBUNDLEID_LANG_RUNNUMBER.tsv where: TEAMNAME: is the name of the team such as registered via the CLEF portal TASKBUNDLEID: is one of the bundle ids as indicated in Table 4. LANG: is de,fr,en RUNNUMBER: is 1,2,3 Example: dreamteam_bundle1_de_2.tsv
• files must include all columns and instantiate the unspecified values in the required columns according to the chosen task bundle.
• files can include the comment lines present in the input, but do not need to.

[aflueckiger]

@e-maud @mromanello Implemented with https://github.com/impresso/CLEF-HIPE-2020-scorer/commit/1bfa3968e7d8d90081be567bc5c2d6d0bffa1be3