Merge pull request #4 from serhiy-yasko/master

A Proofread Version of ScrapingHub Documentation Chapters
Merge pull request #5 from serhiy-yasko/master

Fixed internal hyperlinking issues
Added examples of log levels

Added examples of log levels to make it clear that the API expects constants and not numeric log levels.
add comment api documentation
Merge pull request #8 from scrapinghub/add-comment-api-documentation

add comment api documentation
Updates api documentation for project-wide reports, issue #7.
Minor fixes to Reports API documentation
Merge pull request #9 from scrapinghub/rogerio_7

Updates api documentation for project-wide reports, issue #7.
Minor fix to Reports API
Update api.rst
integrate HS doc and improve overall doc structure
some changes after initial feedback
update jobs.rst
Merge pull request #11 from scrapinghub/hsdoc

Major documentation restructure
add missing colon
remove unsafe operations from collections API
Typo error
Move Job Dashboard text to its section
Use recommended scrapyd-deploy command
Add link to scrapyd installation page
fix KB link. closes #13