travis: irc notification if build status changes

.travis.yml

@@ -5,6 +5,11 @@ compiler:
 
 cache: apt
 
+notifications:
+  irc: "chat.freenode.net#qgis"
+  on_failure: change
+  on_success: change
+
 before_install:
   - sudo apt-get update -qq
   - sudo add-apt-repository ppa:ubuntugis/ppa -y
@@ -16,3 +21,4 @@ install:
   - cmake -DWITH_SERVER=ON -DWITH_STAGED_PLUGINS=OFF -DWITH_GRASS=OFF -DSUPPRESS_QT_WARNINGS=ON ..
 
 script: xvfb-run ctest -V -E 'PyQgsPalLabelingCanvas|PyQgsPalLabelingServer|qgis_wcsprovidertest' -S ../qgis-test-travis.ctest --output-on-failure
+