Made cram tests run on travis

.travis.yml

@@ -90,6 +90,7 @@ before_install:
         brew unlink cmake
         brew install llvm cmake
       fi
+  - pip install cram
   - export CXX=${CC/gcc/g++}; export CXX=${CXX/clang/clang++}
   - $CC --version
   - $CXX --version

test/CMakeLists.txt

@@ -43,9 +43,9 @@ add_custom_target(cram_tests ${CMAKE_COMMAND} -E env
     "CRITERION_NO_EARLY_EXIT=1" # for coverage
     "CRITERION_JOBS=1" # for output ordering
     "CRITERION_DISABLE_TIME_MEASUREMENTS=1" # do not compare timings
-    cram -i ${CMAKE_CURRENT_SOURCE_DIR})
+    cram -v ${CMAKE_CURRENT_SOURCE_DIR})
 add_dependencies(cram_tests criterion_samples)
 
-add_test(cram_tests cram_tests)
+add_test(cram_tests make cram_tests)
 
 endif ()