Added node_modules to gitignore

So locally installed node_modules used for testing will not cloud list
of new files.
Moved quotation marks, added Continuation

Moved quotation marks to conform to the jsig specification.
Added description of `Continuation`.
Fixed `Queryable` definition so it uses `ResultSet` instead of `Results`
when defining use of Continuation.
Modified definition of `Query` so it uses `Continuation` instead of
in-place definition.
Merge pull request #8 from Hypermediaisobar-admin/jsig-compatibility-fixes

Jsig compatibility fixes