Update dpl url to point to current repo location.
blog: rkh/dpl -> travis-ci/dpl in URLs
Add section on things not to cache.
Remove mention of HTTP cache
add a troubleshooting section to the gui docs
correct a code block styling
update caching docs to reflect changes for branch caching
did someone say search? (docs only)
style the search field a little
docs: Add info on how to test with Sauce Labs
Merge pull request #378 from travis-ci/hh-sauce-labs

docs: Add info on how to test with Sauce Labs
Add travis-web as a Sauce Labs example
some minor style changes
remove "on travis-ci.org" from a docs title
Merge branch 'master' of https://github.com/travis-ci/travis-ci.github.com
sauce has a lot of different combos!
link to caching docs
update the caching title
update title for databases doc