Add individual faces

[minikN]

Hello, this PR is adding a lot of new faces to php-mode. Let me explain what I have added.
The following faces (and accompanying regex) have been added:

Classes

• php-class-declaration: will fontify the words class, trait, interface.
• php-class-declaration-spec: will fontify the words implements, extends.
• php-namespace-declaration: will fontify the word namespace.
• php-import-declaration: will fontify the words use ... as ....
• php-class-modifier: will fontify abstract, final keywords in class declaration.

Methods

• php-method-modifier: will fontify abstract, final keywords in method declaration.
• php-method-access: will fontify private, protected, public in method declaration.
• php-method-static: will fontify static keyword in method declaration.
• php-return-type-colon: will fontify : in front of return type declaration.

Properties

• php-property-access: will fontify private, protected, public in property declaration.
• php-property-static: will fontify static keyword in property declaration.
• php-property-const: will fontify const keyword in property declaration.

Statements

• php-block-statement: will fontify if, elseif, for, foreach, while, declare, switch and catch keywords.
• php-flow-control-statement: will fontify break, continue, die, exit, goto, return and throw keywords.
• php-print-statement: will fontify echo, print and var_dump keywords.
• php-include-statement: will fontify include, include_once, require and require_once keywords.

Other Stuff

• php-constant-keyword: will fontify true, false and null.
• php-function-keyword: will fontify function in ... function name(....
• php-number: will fontify integers and floats (13, 4.3, ...)
• php-string-quote: will fontify the string delimiters (', ")
• php-block-delimiter: will fontify block delimiters ((, [, {, ), ], })
• php-type-operator: will fontify insteadof and instanceof keywords.
• php-string-op: will fontify . for string concatenation. I also bootstrapped that in my last PR but somehow forgot to actually implement it.

Default styles

The faces php-type-operator, php-block-delimiter and php-number inherit from default.
The face php-string-quote inherits from php-string.
All other faces inherit from php-keyword

So by default, everything should look the same.

Known issues

• when applying a different style to php-string-qoute in comparison to php-string, occurences of string delimiters inside of the string will also be colored differently.
• as usual, I believe most of the regex could be optimized in many ways. I'm open for suggestions as this is not my strong suite.
• I know that insteadof is no type operator and therefore should not have been grouped in the type-operator face. However, since it's so similar to instanceof I put it in anyway.

[zonuexe]

👍

[minikN]

Is this still being worked on? Just wondering.