add bob assignment
add pyc files to gitignore
add rna transcription assignment
add wordcount assignment
add python curriculum
use better method for translation in example
add anagram assignment
add beer-song example
add nucleotide-count assignment
add recent assignments to curriculum

forgot beer-song and nucloetide-count earlier
add point-mutations exercise
add phone-number assignment
add grade-school assignment
add robot-name assignment
standardize Python exercise error messages
add etl assignment
add leap year example

this leaves out the monkeypatching bit since it's super ugly/hacky/bad
in Python.
Make current exercise accessible. Fixes #365.

A user may now see and discuss other people's solutions to the exercise
that they are currently working on. It won't show up on their dashboard,
but if they have a link to it, they can view it.
elixir version of nucleotide-count changed: one element lists like 'C' or 'T' replaced by characters like ?C or ?T.
Merge pull request #413 from leikind/master

elixir version of nucleotide-count changed: one element lists like 'C' or 'T' replaced by characters like ?C or ?T.