Merge pull request #32 from KevWright/master

Modified manuals/enterprise-api.markdown
Shorten title again, with fix for ruby keyword 'on'
Shorter categories and tagging as well
Editorial.
Linebreaks.
Editorial: Format, whitespaces.
Find and fix typo.
Consistent spelling of 'namespace' (instead of name space).
First shot at Multi-Site Query documentation.
Move API basics into reference
Editorial comment
Added a _references.md file that is an inventory of all html aliases (including path) plus an identifier and the title. This information can be used with the jekyll-references plugin (https://github.com/olov/jekyll-references) or simply as a reference file for inventory purposes etc.