tree-index 0.5.0

## 2018-09-03, Version 0.4.1
### Commits
- [[`271ed7d7db`](https://github.com/datrs/tree-index/commit/271ed7d7db23c32e9f82a253bb3fc9a598567575)] (cargo-release) version 0.4.1 (Yoshua Wuyts)
- [[`80977f5fac`](https://github.com/datrs/tree-index/commit/80977f5face6c68fb5754ea286ca26002440aee2)] use bitwise operator (#5) (周汉成)
- [[`766bb7dd82`](https://github.com/datrs/tree-index/commit/766bb7dd82e7ea0b4227a5d0b3d031886c47e09a)] update .github (Yoshua Wuyts)
- [[`82e189ef4e`](https://github.com/datrs/tree-index/commit/82e189ef4eb6b4dba4f9003e946f3601eeecb149)] Switch to clippy-preview (#3) (Szabolcs Berecz)
- [[`f3d0e3833b`](https://github.com/datrs/tree-index/commit/f3d0e3833ba7a457f0c9183f8a63b0dad0a28a4a)] (cargo-release) start next development iteration 0.4.1-alpha.0 (Yoshua Wuyts)

### Stats
```diff
 .github/ISSUE_TEMPLATE.md                 | 40 +++-----------------------------
 .github/ISSUE_TEMPLATE/bug_report.md      | 23 ++++++++++++++++++-
 .github/ISSUE_TEMPLATE/feature_request.md | 30 ++++++++++++++++++++++++-
 .github/ISSUE_TEMPLATE/question.md        | 18 ++++++++++++++-
 .travis.yml                               |  6 +++--
 Cargo.toml                                |  2 +-
 src/lib.rs                                | 21 ++---------------
 7 files changed, 83 insertions(+), 57 deletions(-)
```