Run all tests in directory.
Fix printing err.txt and out.txt
Merge remote-tracking branch 'origin/master' into run-all-test-in-directory
Fix log info
Merge pull request #990 from methane/run-all-test-in-directory

Have Travis-CI verify all tests that can run on Linux, not just one test
Improve changed file detection
Use git log to look at commit changes
Merge pull request #997 from hamiltont/travis-changes-hotfix

hotfix: Travis change detection
Modify erlang setup
Download specific erlang version
Remove old code
Fix minor typo
Add comment
Download erlang to specific location
Change erlang install check
Remove erlang before install
Indicate it's esl-erlang, not erlang
try more