Switching travis to trusty

Author: rbock

.travis.yml

@@ -4,6 +4,9 @@ os:
   - linux
   - osx
 
+dist: trusty
+sudo: required
+
 compiler:
   - clang
   - gcc
@@ -22,6 +25,7 @@ install:
   - cd date
   - git checkout tags/v1.0.0
   - cd ..
+  - g++ --version
   - if [ "$TRAVIS_OS_NAME" == "linux" ]; then
     sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
       && sudo add-apt-repository -y ppa:apokluda/boost1.53