Merge branch 'release/v0.4.4'

Author: MarkGriffiths

.travis.yml

@@ -19,7 +19,14 @@ notifications:
     on_success: always
     on_failure: change
     on_start: never
+env:
+  - CXX=g++-4.8
 addons:
+  apt:
+    sources:
+      - ubuntu-toolchain-r-test
+    packages:
+      - g++-4.8
     code_climate:
         repo_token: f017a295c85532d945c74fe17b7f45c516ff72ef478548a99b165927aaa321d7
 after_script: