add travis (#4)

* add travis

* update ci

Author: ChrisLinn

.travis.yml

@@ -0,0 +1,49 @@
+language: rust
+cache: cargo
+sudo: required
+
+os:
+  - linux
+  - windows
+  - osx
+
+rust:
+  - stable
+  - nightly
+
+# Dependencies of kcov, used by coverage
+addons:
+  apt:
+    packages:
+      - libcurl4-openssl-dev
+      - libelf-dev
+      - libdw-dev
+      - binutils-dev
+      - cmake # also required for cargo-update
+    sources:
+      - kalakris-cmake
+
+matrix:
+  allow_failures:
+    - rust: nightly
+  fast_finish: true
+
+install:
+  - if [[ $TRAVIS_RUST_VERSION == "stable" ]]; then rustup component add rustfmt; fi
+  - if [[ $TRAVIS_RUST_VERSION == "stable" ]]; then rustup component add clippy; fi
+
+before_script:
+  - export PATH=$HOME/.cargo/bin:$PATH
+  - cargo install cargo-update || echo "cargo-update already installed"
+  - cargo install cargo-travis || echo "cargo-travis already installed"
+  - cargo install-update -a # update outdated cached binaries
+
+script:
+  - cd kamyu104 && cargo test --verbose --all
+
+after_success:
+  # measure code coverage and upload to coveralls.io
+  - cargo coveralls
+env:
+  global:
+    - RUST_BACKTRACE=1

README.md

@@ -1,5 +1,8 @@
 # rust-leetcode-solutions
 
+[![Build Status](https://travis-ci.org/rust-interview/rust-leetcode-solutions.svg?branch=master)](https://travis-ci.org/Fullstop000/wickdb)
+[![Coverage Status](https://coveralls.io/repos/github/rust-interview/rust-leetcode-solutions/badge.svg?branch=master)](https://coveralls.io/github/Fullstop000/wickdb?branch=master)
+
 ## [kamyu104's](https://github.com/kamyu104/LeetCode-Solutions)
 ```
 cd kamyu104