Improve number regexes

On Windows:
Character Map -> U+00A0 -> Select -> Copy

Revert "Improve number regexes"

Improve number regexes

Taken from language-javascript
Fixes #260

Combine class use patterns

* Rename accidental `punctuation.definition.separator.delimiter.php` ->
`punctuation.separator.d...

Recursively match curly brackets

move clone operator out of storage.modifier

Fix #235 - support \ in use statements

End PHPDoc even if there are malformed types

Support grouped 'use' declarations

Update Travis config

PHP only supports top-level grouping

Refactor namespace highlighting

Support namespaced PHPDoc types

Support deeply-namespaced function calls

Fixes #237

Fixes #234

Fixes #233

Fixes #232

Tokenize PHPDoc param types

Add structure to switch statements

Add basic support for commas

Fixes #223

Support namespaced typehints

Fixes #222

Functions themselves cannot be passed-by-reference

Also require a space before declaring variables that are
passed-by-reference

Copied from language-javascript
Fixes #226

Tokenize the special 'class' keyword when used in scope resolution

Support 'use' in traits

Add basic specs for embedded SQL

Tokenize function return values

Tokenize typehinted function arguments with default values

Fixes #178

Tokenize multiple exceptions in a catch clause

Fix inline include not stopping at the closing PHP tag

Add another PHP snippet

Tokenize parentheses

Add AND as a valid SQL keyword

Fixes #52

Remove meta scope that doesn't exist in any other language

We don't have anything called "select scope" anyway.

Tokenize $this as variable.language.this.php

Move most specs out of the 'operators' section

Cleanup