ebnf
return a Choice instead of a Fparsec success/failure
add a first test
add every bin folder to the gitignore
Merge branch 'master' of https://github.com/archaeron/Calculon

* 'master' of https://github.com/archaeron/Calculon:
  fix backspace bug in repl
  various improvements to repl and better history
  bugfixes repl
  abstract line indicator
  various bugfixes to repl
  add right arrow navigation to repl
  start with new repl
  fix associativity of -

Conflicts:
	Calculon/Repl.fs