added before_script step
added sudo to all installation commands
forgo install python deps
cd to glog dir
leave glog dir
leave glog dir
added protobuf compiler
should be working build
should be working build
should be working build
added ld lib path
updated ldlibrary path
update so that we only run the build, forego the test until PR #561 gets merged
Add (CPU-only) test, lint, warn and parallel (-j 4) to travis CI build.
Add /usr/local/lib to travis config (seems needed for LMDB).
Allow users to override the default compiler by specifying a CXX in
their Makefile.config.  (The CUSTOM_CXX still works fine.)
Create runtestnogpu Makefile target; use in .travis.yml.
Put export in "before_script"; disable clang build -- doesn't work on Linux.
Cache Ubuntu apt packages.
Install bc package to hopefully suppress "bc: not found" errors
Get apt packages before_install as suggested by Travis official docs