Add unsolved Go Clock exercise
Extract the yelling check to a method in bob.exs
Remove the downcase indirection in word_count.exs
Add unsolved list-ops exercise in Elixir
Add first attempt at a clock.go solution
Add go gigasecond problem
Add first attempt at gigasecond.go solution
Add unsolved raindrops problem in Go
Add raindrops.go solution
Add unsolved triangle problem in Go
Cleanup leap.go using a switch statement

Man Go is so cool
Use String.ends_with?/2 in bob.exs

Also use === in the empty check, though it doesn't really make
a difference because it's guaranteed to be a string anywho.