wip: save before hep migration

wip: save before hep migration

wip: save ui before hep migration

wip: save tester before hep migration

wip: save new-vegas before hep migration

wip: save fix/qcd-lambda-warning before hep migration

wip: save fix/check-links before hep migration

wip: save api before hep migration

chore: add .dockerignore and ignore test_histogram_error/*.eml

doc: revise LoopCompHEP section based on existing form factor infrastructure

fix: initialize myfunc5/myfunc6 return values to 0.0

test: add H_loop model (14) and myfunc form factor tests