* train/2 takes a chain and a list of words to train them on
* add_weight/4 takes a chain, a list of words (the key), the word it
points to, and an optional increment which will increment the value of
a weight, or insert the weight.
Signed-off-by: Alek Ratzloff <alekratz@gmail.com>
For some reason there doesn't appear to be a binary search function in
Elixir's standard library, so this implements that.
Signed-off-by: Alek Ratzloff <alekratz@gmail.com>
