allowed_domains GET parameter + server customization overhaul
allowed_domains: cleanup + tests
corrected handling of empty proxy_profiles_path
wait for ports to be listening before starting tests
Merge pull request #37 from scrapinghub/waitport

[MRG] wait for ports to be listening before starting tests
this line is also no longer needed
enable buildbot tests
remove unused mockserver endpoints: /partial, /drop
Merge pull request #34 from kmike/allowed_domains

allowed_domains GET parameter
do not construct cache object on every request. this solves performance issues with large caches