Add current word/character count for text fields that limit those

[mysticuno]

I was filling out registration for MakeMIT and testing Blueprint registration. MakeMIT had a word limit and Blueprint had a character limit for the free response questions. Whereas Blueprint truncated the response once I got to their character limit (1000 chars), MakeMIT's registration gave me no feedback in terms of begin over the limit (and would allow me to submit with responses of arbitrary length).

It would be nice to have some feedback as your typing your response as to how close I am to my limit (I'm guessing something like "n words/characters remaining"). It might also be nice to add some verification to actually enforce these limits.