Add some clarification on code examples
Merge pull request #37 from Aerlinger/master

Add some clarification on code examples
Fixes #38, error in `empty!` for Deque.
Merge pull request #39 from MichaelHatherly/mh/fix-deque-empty

[RFC] Fixes #38, error in `empty!` for Deque.
Import serialize_type in hashdict.jl
Merge pull request #40 from davidanthoff/serializetypehashdict

Import serialize_type in hashdict.jl
Bump REQUIRE to v0.3, for incompatible change in test_throws

* This version of DataStructures will be bumped to v0.3.0
* Versions compatible with Julia 0.2 will be available on the julia_v0.2 branch,
  and can continue to be tagged with v0.2.x numbers
Remove trailing whitespace
Add more constructors for Trie
Add path(::Trie, ::String)
Remove trailing whitespace
Add documentation