Merge branch 'develop' of https://github.com/boostorg/integer into develop

.travis.yml

@@ -311,10 +311,9 @@ install:
   - cd boost-root
   - git submodule update --init tools/build
   - git submodule update --init libs/config
-  - git submodule update --init libs/assert
-  - git submodule update --init libs/core
-  - git submodule update --init libs/static_assert
+  - git submodule update --init tools/boostdep
   - cp -r $TRAVIS_BUILD_DIR/* libs/integer
+  - python tools/boostdep/depinst/depinst.py integer
   - ./bootstrap.sh
   - ./b2 headers