Travis CI will now build dependencies from source if missing or outdated

build.py

@@ -5,6 +5,8 @@ if __name__ == "__main__":
                                  channel="testing",
                                  stable_branch_pattern="release/*",
                                  upload="https://api.bintray.com/conan/mpusz/conan-mpusz",
-                                 remotes="https://api.bintray.com/conan/martinmoene/nonstd-lite")
+                                 remotes="https://api.bintray.com/conan/martinmoene/nonstd-lite",
+                                 build_policy="outdated",
+                                 upload_dependencies="all")
     builder.add_common_builds(pure_c=False)
     builder.run()