changed jsonError object and his filename
updated .*ignore files
fixed URL examples to match the new example
dependencies updated
minor changes in syntax and internal formats
added some types (mututated from amarcord's types)
Many changes in this commit
* fixed great part of the bugs: typos, missing parameters, logic fallacies
 and so on, nothing of more than one/two lines
* fixed response format issues
* re-visited all the linked resource fetching logic: now it shares a
 common ground with sub-resource fetching, the superset field contains
 information about additional filtering due to this.
added empty response case for linked resources too
added support for querystring parameters shortcuts also for filters, fixed typo in filters parsing