Implement `os_mkdtemp` on top of `uv_fs_mkdtemp`
documentation: Update tempfile and tempname()
Merge pull request #1034 'Implement `os_mkdtemp` on top of `uv_fs_mkdtemp`'
build/test: setup functional tests using vroom
build/test: setup vroom installation on travis
Merge pull request #1050 'Setup testing infrastructure with vroom'