ENH fmtxt:  basic HTML support
ENH fmtxt:  enhanced FMText baseclass
ENH fmtxt:  generalize get_… method options to use `options` dictionary
ENH fmtxt:  new FMTextElement baseclass
DOC fmtxt
ENH fmtxt:  HTML report creation
EXA:  fmtxt report
TEST:  copy examples into tempdir with aux files
TEST:  run example tests with empty globals
ENH fmtxt:  Cache complete report

Allow creating the whole report without saving any file to disk
DOC fmtxt
ENH fmtxt:  add TOC to HTML Report