Added TravisCI and Coveralls Support

Changes to be committed:
	new file:   .travis.yml

.travis.yml

+language: rust
+sudo: false
+addons:
+    apt:
+        packages:
+        - libcurl4-openssl-dev
+        - libelf-dev
+        - libdw-dev
+        - elfutils
+rust:
+- nightly
+before_script:
+- |
+  pip install 'travis-cargo<0.2' --user &&
+  export PATH=$HOME/.local/bin:$PATH
+script:
+- |
+  travis-cargo build &&
+  travis-cargo test &&
+  travis-cargo bench
+after_success:
+- travis-cargo coveralls --no-sudo
+
+env:
+    global:
+    - TRAVIS_CARGO_NIGHTLY_FEATURE=""