Merge pull request #17 from ddpbsd/master

I don't know if oRFC/index was lost, but it isn't there now.
Add a screenshot of importing the virtual appliance.
wrong branch, but no harm done.
Merge pull request #18 from ddpbsd/master

Update the whats new section
adding json output format example
Merge pull request #19 from jrossi/json-docs

adding json output format example
Merge branch 'master' of https://github.com/ossec/ossec-docs