install testthat from GitHub
print logs on failure
install LaTeX to satisfy otherwise failing tests
Merge pull request #389 from krlmlr/test2

Refinements to .travis.yml
Re-run document in check_doc()
Make reloading a little more robst
when documenting
Update documentation
devtools.desc.author and .license now in vogue

documentation had it 'devtool.author' and 'devtool.license'; fixed
Merge pull request #395 from shabbychef/master

devtools.desc.author and .license now in vogue