self functions

[Bucaran]

Add a `self` decorator to functions that makes them return `this` by default.

		export function self myMethod () {
			// return this by default
		}

This decorator could be used to make any function bound to the current scope `this` as well so:

		func(function self () { // this is bound to my dad’s scope })

Would be roughly equivalent to:

		func(() => { // this is bound to my dad’s scope })

Although I personally would favor the arrow function syntax, the `self` decorator could be 
used to optimize binding generators, so instead of:

		func(function* () { }.bind(this))

One could write:

		func(function self* () { })

Similary it could be used in promise handlers, so instead of:

		new Promise(function (resolve, reject) { }.bind(this))

One could write:

		new Promise(function self (resolve, reject) { })

It would be even sweeter if you didn’t need to specify the keyword function when writing `self` functions:

		new Promise(self (resolve, reject) { })