[Travis] Install gdcm dependency.

.travis.yml

@@ -8,6 +8,6 @@ branches:
 
 before_install:
   - sudo apt-get update -qq
-  - sudo apt-get install -y libqt4-dev libdcmtk2-dev libinsighttoolkit3-dev
+  - sudo apt-get install -y libqt4-dev libdcmtk2-dev libinsighttoolkit3-dev libgdcm2-dev
 
 script: ctest -VV -S ./CMake/ctkTravisDashboardScript.cmake

CMake/ctkTravisDashboardScript.cmake

@@ -162,3 +162,4 @@ include(${dest})
 set(travis_url "/tmp/travis.url")
 file(WRITE ${travis_url} "https://travis-ci.org/commontk/CTK/builds/$ENV{TRAVIS_BUILD_ID}")
 ctest_upload(FILES ${travis_url})
+file(REMOVE ${travis_url})