Use recommended scrapyd-deploy command
Add link to scrapyd installation page
imporve api.rst

A few sentences appear both in the preamble of "API basics" and the
 "Using the HTTP API" Section.
Merge pull request #15 from scrapinghub/shuai-fix

improved api.rst
Merge pull request #14 from scrapinghub/scrapyd

Use recommended scrapyd-deploy command
tidy up pagination doc
minor update
Add info on using multiple prefixes and endts
added command line client doc
respect title conventions
remove no longer supported offset argument
Updating job outcomes
Merge branch 'develop'