Fixed minor grammatical issue in JSON-LD Syntax spec.
More minor grammatical fixes.
Fix playground

The updates to the playground introduced a "bug" that resulted in a syntax error every time someone entered a *valid* JSON-LD document in the input field but didn't fill out the context field.
"Rock star" and "ninja" are red flags and/or cliches

Per http://lwn.net/Articles/552848/, terms like "rock star" and "ninja"
may elicit negative reactions from a more diverse community. In
addition, the terms have been overused (a search for "rock star ninja"
will provide evidence of a fair amount of backlash against said terms).

Thus, a more direct statement that also retains the second-person usage
of "you" elsewhere in the same page.

Signed-off-by: Dan Scott <dan@coffeecode.net>
Merge pull request #292 from dbs/less_rockstar

"Rock star" and "ninja" are red flags and/or cliches
Fix test so that @base is set to none (not reset) for @base: null.

- See: https://github.com/json-ld/json-ld.org/issues/223#issuecomment-17553907
Update to latest jsonld.js.
Use the base option instead of the mistakenly used compactArrays option

... when setting the base.
Do not process expandContext twice

It is already processed in the algorithms of JsonLdProcessor's methods
Interpret objects that do not have a @context entry as the JSON-LD context when passed into the API functions

Previously, all context parameters required a valid context document, i.e., an object with a @context member. Now the value of such a member can be passed in directly.

This addresses #245
Clarify "list of lists" feature at risk marker

List of lists using the @list construct are still not supported.
Prepare CR draft for the JSON-LD API specification
Fix typo
Little algorithm clarification

as suggested by @dlongley. I hope this is better!?
Fix typo.
Fix duplicated word typos.
CRLF to LF.