use percent encoding for X-Sandstorm-Username
Fix up tests README to a bit more clear on what is needed for docker
Merge pull request #182 from jparyani/fix-tests-readme

Fix up tests README to a bit more clear on what is needed for docker
Merge pull request #181 from dwrensha/x-sandstorm-username

use percent encoding for X-Sandstorm-Username
Make waits longer to try and solve intermittent failures on build server
Merge pull request #184 from jparyani/change-test-waits

Make waits longer to try and solve intermittent failures on build server