Improve HTTP sub-request documentation.
Merge pull request #126 from pygy/patch-2

Improve HTTP sub-request documentation.
docs for routes and some organization
update route docs
try different test script
add and document cookie_attributes method
update cookie docs some more
fix typo
silence travis until test environment figured out
attach server doesn't require an existing config to be written, #125
get rid of concept of attached server stack
add wait_until_closed, use on attached server detach, fixes subsequent server creations
update database docs, replace deprecated ngx_postgres backend with pgmoon
pgmoon is a dependency, lock the lua version
change the default application structure
update documentation for new default application structure
update outdated examples
strip tabs
spec.server.request can override the port

document port param
rebuild