Run 3.0 branch on Travis.

Author: Benjamin Chrétien

.travis

@@ -5,7 +5,7 @@ compiler:
 env:
   global:
     - APT_DEPENDENCIES="doxygen doxygen-latex libltdl-dev libboost-all-dev liblog4cxx10-dev coinor-libipopt-dev libblas-dev liblapack-dev libmumps-seq-dev gfortran libqhull-dev"
-    - GIT_DEPENDENCIES="roboptim/roboptim-core roboptim/roboptim-core-plugin-ipopt"
+    - GIT_DEPENDENCIES="roboptim/roboptim-core:3.0 roboptim/roboptim-core-plugin-ipopt:3.0"
     - DEBSIGN_KEYID=5AE5CD75
     - PPA_URI="roboptim/ppa"
     - NSIQCPPSTYLE_FILEFILTERPATH=cmake/filefilter.txt
@@ -23,6 +23,7 @@ notifications:
 branches:
   only:
   - master
+  - "3.0"
   - debian
   - travis
 before_install: