Makes the test suite run again.

Main problem was an accidentally shadowed variable that was only
used on IE.

Closes #1607

Which had been accidentally removed.

\b can match the inside of a class name (-).

* hex not supported by cassandra
* binary not supported by cassandra
* new syntax: "1." (mysql,mariadb,oracle)

* Handle default string % literal for Ruby

  %{Hello World} == %q{Hello World}

  One gotcha though:

  5%(2) == 5 % 2

  Will be seen as a string, but it will be interpreted
  as the modulo operator by ruby.

* Variables names can't include a ? nor a !

* Improve symbols parsing rules

  - can be operators (e.g :+, :/, :-, :>>)
  - start with @ or $
  - end with !, ? or =
  - can't start by a digit

  Though when defined in reverse as hash keys (e.g {foo: 'bar'})

  - can only start with [a-zA-Z\_]
  - can't end with =

* Instance and class variables can't start by a digit but globals can be only digits

* Add some missing keywords

  Actually only __END__ is really a keyword.
  But __FILE__, __LINE__ and __dir__ are special variables so most editors highlight them as keywords.

* Several regexp improvements

  - Use the string-2 class for regexps like JS mode
  - Xonsider %r as a regexp
  - Handle interpolation inside regexps

  It allow to colorize properly stuffs like:

  ```ruby
/foo #{1 + 2}/
%r{foo #{@bar} baz}
```

* Fix parsing of brace enclosed string literals with interpolation

  As an example:

  ```ruby
%Q{foo #{42} baz #{26} fizz}
```
  The coloration was broken after the first interpolation.

```
$ test/run.js
keymap/emacs.js: Trailing whitespace at line 184, column 71
keymap/emacs.js: Unused argument precise (109:25)
keymap/vim.js: Unexpected token (193:22)
```

It now has an xRel property that can be -1, 0, or 1, rather than a boolean after.

This way, we can distinguish between precise matches and coords after the
returned position.

Deprecate onKeyEvent and onDragEvent

Default is still true.

Closes #1592

New mime types x-shader/x-vertex (vertex shaders) and
x-shader/x-fragment.

* add x-cassandra
* add support.doubleQuote
* add support.commentSlashSlash

The height of an 'inline' element is pretty much meaningless.

See #1581

 * More comments

 * MySQL/MariaDB: add \N as synonym of NULL

 * separate support.charsetCast (_utf8'str') from support.nCharCast (N'str')

 * oracle supports: nCharCast, zerolessFloat

 * comment which explains Mime Types properties

Cleans a lot of insert mode record/replay code.
Adds support for o and O.
Adds unit tests and fixes a lot of corner cases.
Fixes cw deleting trailing whitespace.

* add support to "charsetCast" with syntax n str or N str or _charset str
* add example in index.html

For folding Java and C/C++ style import/include blocks.