Add .gitignore.
Add links to other language bindings for hat-trie.
Fix typo in comment.
Fix another typo.
Merge pull request #15 from b4hand/add-gitignore

Add .gitignore.
Merge pull request #16 from b4hand/add-other-language-bindings

Add links to other language bindings for hat-trie.
Merge pull request #17 from b4hand/fix-typo

Fix typo in comment.