Word Search by N-gram

[paceaux]

users should be able to search for words by n-gram.

Given an n-gram, a user should be able to find all words using this n-gram.

e.g.:

var m = New Methodius('This is the most ethereal thing in Math');
words = m.findNGram('th'); // ['This', 'the', 'ethereal','thing', 'Math'];