TST: json test file, make encoding explicit
Merge pull request #6101 from Komnomnomnom/json-remove-bom

TST: json test file, make encoding explicit
ENH: add show_dimensions display config
ENH: html repr respects show_dimensions
DOC: add show_dimensions to faq
Merge pull request #6041 from hayd/master (reworked)

* hayd-show_dimensions_option:
  DOC: add show_dimensions to faq
  ENH: html repr respects show_dimensions
  ENH: add show_dimensions display config
COMPAT: provide compat tests and better error messages for multiple file opening
        on PyTables >= 3.1 (GH6047)