Add LICENSE file, travis configuration

.travis.yml

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+language: "rust"
+cache: "cargo"
+rust:
+  - 1.36.0
+  - stable
+  - beta
+  - nightly
+jobs:
+  allow_failures:
+    - rust: nightly
+  fast_finish: true
+
+before_script:
+  - rustup component add rustfmt
+  - |
+      if [ "$TRAVIS_RUST_VERSION" != "1.36.0" ]; then
+        rustup component add clippy
+      fi
+  - |
+      if [ "$TRAVIS_RUST_VERSION" == "stable" ]; then
+        cargo install --force cargo-audit
+      fi
+  - cargo generate-lockfile
+script:
+  - |
+      if [ "$TRAVIS_RUST_VERSION" == "stable" ]; then
+        cargo audit
+      fi
+  - cargo fmt -- --check
+  - |
+      if [ "$TRAVIS_RUST_VERSION" != "1.36.0" ]; then
+        cargo clippy --all-targets --all-features -- -D warnings
+      fi
+  - cargo build --verbose
+  - cargo test --no-default-features --verbose
+  - cargo test --all-features --verbose
+if: "type != push OR (tag IS blank AND branch = master)"

LICENSE

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+Copyright (c) 2016 Jimmy Cuadra
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.