Merge pull request #33 from jw3/publish

update travis for publishing on tags

Author: jw3

.travis.yml

@@ -1,13 +1,12 @@
 language: scala
 
-before_install:
- - chmod +x scripts/travis.sh
-
 scala:
    - 2.11.8
    - 2.12.6
 jdk:
   - oraclejdk8
 
 script:
-  - "scripts/travis.sh"
+  - sbt ++$TRAVIS_SCALA_VERSION test
+  - if [[ ! -z "$TRAVIS_TAG" ]]; then sbt ++$TRAVIS_SCALA_VERSION publish; fi
+  - if [[ ! -z "$UPDATEIMPACT_API_KEY" ]]; then sbt ++$TRAVIS_SCALA_VERSION updateImpactSubmit; fi