Enable Travis on feature branches

.travis.yml

@@ -14,6 +14,7 @@ branches:
   only:
     - master
     - develop
+    - feature/*
 
 env:
   matrix:
@@ -284,8 +285,9 @@ matrix:
       env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++1z
 
 install:
+  - BOOST_BRANCH=develop && [ "$TRAVIS_BRANCH" == "master" ] && BOOST_BRANCH=master
   - cd ..
-  - git clone -b $TRAVIS_BRANCH https://github.com/boostorg/boost.git boost-root
+  - git clone -b $BOOST_BRANCH https://github.com/boostorg/boost.git boost-root
   - cd boost-root
   - git submodule init libs/align
   - git submodule init libs/assert