Implement accessors without instantiating

[asgrim]

Comment from @Ocramius (see here)

You can create an accessor even without the instance of the object or internal reflection.

See http://ocramius.github.io/blog/accessing-private-php-class-members-without-reflection/

This would mean we could support the following methods:

• ReflectionClass::getStaticPropertyValue - see Implement [g|s]etStaticPropertyValue in ReflectionClass #114
• ReflectionClass::setStaticPropertyValue - see Implement [g|s]etStaticPropertyValue in ReflectionClass #114
• ReflectionMethod::getClosure - see Implemented ReflectionMethod::getClosure() #354
• ReflectionMethod::invoke - see Implemented ReflectionMethod::invoke(), invokeArgs() and setAccessible() #355
• ReflectionMethod::invokeArgs - see Implemented ReflectionMethod::invoke(), invokeArgs() and setAccessible() #355
• ReflectionMethod::setAccessible - see Implemented ReflectionMethod::invoke(), invokeArgs() and setAccessible() #355
• ReflectionFunction::getClosure - see Implemented missing functions in ReflectionFunction #357
• ReflectionFunction::invoke - see Implemented missing functions in ReflectionFunction #357
• ReflectionFunction::invokeArgs - see Implemented missing functions in ReflectionFunction #357
• ReflectionProperty::setAccessible - see Implemented ReflectionProperty::setAccessible(), getValue() and setValue() and ReflectionClass::getStaticProperties() #343
• ReflectionProperty::setValue - see Implemented ReflectionProperty::setAccessible(), getValue() and setValue() and ReflectionClass::getStaticProperties() #343

[asgrim]

Related to #7

[asgrim]

Some currently-failing .phpt tests for invoke, setAccessible, and setValue can be found: https://gist.github.com/asgrim/4cd0d4ca9f7165754419458ffbfec467

[kukulich]

Some accessors implemented in #343

[kukulich]

@Ocramius Could you please check methods in the description that are done now?

[Ocramius]

@kukulich done

[kukulich]

ReflectionMethod::getClosure() implemented in #354

[kukulich]

ReflectionMethod::invoke(), ReflectionMethod::invokeArgs() and ReflectionMethod::setAccessible() implemented in #355

[kukulich]

ReflectionFunction::invoke(), ReflectionFunction::invokeArgs() and ReflectionFunction::getClosure() implemented in #357

[Ocramius]

Shipped! Thanks for the hard work, @kukulich!