Initial commit
Added a comment
Added term removal from the trie
Added the export list to the package.
Added basic postings implementation

Now we have postings with linked-list,
its performance can be improved later
if necessary, or just replace them with
skip lists.
Added basic tests and postings
Added an basic implementation of an
in memory index.
Merge branch 'master' of https://github.com/jagg/hound