Add documentation for change in travis-build.  Travis now uses go test with ./... as the package list, which runs all tests in subdirectories as well as the root directory (without that specification, only tests in the root directory are run).
Also fixed the build script documentation, as it already had been changed to use ./... but evidently the documentation wasn't updated at the same time.
Merge pull request #214 from natefinch/master

Doc changes to reflect changes in travis-build