Add N1QL language support

[TMWilds]

N1QL is a query language for the Couchbase NoSQL database. Fixes #1619.

N1QL, while intentionally similar to SQL, is not an extension or variant of SQL. As such, there are a number of differences in the classification of general keywords, operators and booleans, along with some other differences and structural changes.

This contribution adds syntax highlighting for N1QL, including the full set of builtin functions and operators.

Some examples:

[RunDevelopment]

Thank you for your contribution!

There are few minor things on which I commented but all in all, it seems like this is a really solid PR.

This is not a full review yet. I just gave it a quick look and will properly review it as soon as I find the time to do so.

[RunDevelopment]

1. Ignore case flag and [eE]. Please choose one (I recommend the i).
2. Please remove the first [+\-]?. It will only cause trouble and you don't even match -1.
3. You don't need to escape the - if it's the last char in a set.
4. Too bad that my favorite numbers .02e2 and 2. are not matched.

[RunDevelopment]

Here is my full review:

Your current implementation does not support object construction and array slicing.

These two and my comments are all I could find. Really good work!

[TMWilds]

@RunDevelopment Thank you for the feedback! Seems to mostly come down to me not being the best with regexes, and a few oversights also...
I'll aim to make the changes and additions you suggested soon. Thanks again!

[TMWilds]

Took me much longer than I expected to get round to doing this, but the changes @RunDevelopment have been added!

[RunDevelopment]

Looks really good @TMWilds!

Please resolve the merge conflict, so we can merge this.

Also, could you please add .02e2 and 2. to the number test?

[TMWilds]

@RunDevelopment maybe an obvious question, but how do you recommend resolving those conflicts given they're generated by the build process? Rebase and then re-build perhaps?

[RunDevelopment]

The only real conflict is in prism-show-language.js.
To replace

<<<<<<< master
var Languages = /*languages_placeholder[*/{ ... }/*]*/;
======= 
var Languages = /*languages_placeholder[*/{ ... }/*]*/;
>>>>>>> master

with

var Languages = /*languages_placeholder[*/{ ... }/*]*/;

What's between the brackets doesn't really matter, cause gulp will fill it in.

components.js and prism-show-language.min.js are both generated so running gulp will resolve these.

[TMWilds]

Thanks @RunDevelopment, that seems to have gone well!

[RunDevelopment]

Thank you for contributing!