ci: add travis ci config

Signed-off-by: Fullstop000 <fullstop1005@gmail.com>

.travis.yml

@@ -0,0 +1,40 @@
+language: rust
+cache: cargo
+sudo: required
+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: stable
+  fast_finish: true
+
+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+  - cargo install-update -a # update outdated cached binaries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:
+  - cargo build --verbose --all
+  - cargo test --verbose --all
+
+after_success:
+  # measure code coverage and upload to coveralls.io
+  - cargo coveralls
+env:
+  global:
+    - RUST_BACKTRACE=1