Fix windows problem.

When you run scrapyd on Windows, paths like C:\\blah are generated and then the "C" is assumed to be the storage type resulting in errors ("Unknown feed storage scheme: c" - from feedexport.py). Adding "file://" should be enough to fix this problem.
add scrapyd script, a twistd light wrapper for cotrolling scrapyd. some deployment fixes to work with scrapy>=0.18
replaced somd old references to twistd
simplified debian files
display scrapyd version at startup
many improvements to the documentation, simplified setup.py, set version to 1.0 (not released yet)
more simplifications to debian package
fix bug in Makefile.buildbot and more simplifications to how packages are built
make sure the default version on debian/changelog is always lower than the auto-generated one
add include_package_data to setup.py
add scrapyd-deploy command, aimed to replace 'scrapy deploy'
add scrapy-deploy debian package, for deploying the scrapy-deploy command
gitignore cleanup
limit travis-ci build matrix to useful envs
fix reference to Scrapy in README.rst or pypi refuses to render it
run scrapyd tests instead
include patch number in version
made Scrapyd packag name lowercase
add 'start_time' field in webservice for running jobs
update api doc (add "start_time" field for running job)