Ascii alternatives to forall and lambda

[NoamDev]

with this PR it is possible to use "forall" and "lambda" instead of "∀" and "λ".
It is now also possible to use white space betweern them, and the parentheses.

[VictorTaelin]

you need a space after the "lambda " and "forall ", otherwise that'll clash with variable names that start with these words

[NoamDev]

It's ok to have some reserved words, isn't it? Every language does that.
I think it'd be weird to require a whitespace. Strict spacing is annoying, look how people struggle with "n-1" and "n - 1" in bend (Not like I have a better idea off the top of my head).

[NoamDev]

Oh, now I get what you meant...
Hmm, I'll try doing something, that'll check for either "lambda " or "lambda(" to avoid the strict-spacing issue.

[NoamDev]

@VictorTaelin
Here, this fixes the syntax clash.
#14