Build: use Boost 1.58 for Travis build. Refs #956

.travis.yml

@@ -14,7 +14,6 @@ addons:
     - gcc
     - clang
     - graphviz
-    - libboost1.55-all-dev
     - libdb++-dev
     - libdb-dev
     - libgtest-dev
@@ -23,8 +22,13 @@ addons:
     - libssl1.0.0
     - libunbound-dev
     - libunwind8-dev
-    #sources:
-    #- ubuntu-toolchain-r-test
+    sources:
+    - ubuntu-toolchain-r-test
+before_install:
+- sudo add-apt-repository -y ppa:kojoley/boost
+- sudo apt-get -q update
+install:
+- sudo apt-get -y install libboost-{chrono,program-options,date-time,thread,system,filesystem,regex,serialization}1.58{-dev,.0}
 script: make -j2 && HAVE_DOT=YES doxygen Doxyfile
 notifications:
   email: false