Encode/decode :raw bindings

[chasenlehara]

Right now, encode("nameProp:raw") returns "nameProp:raw" when I think it should return "name:u:prop:raw".

I think support for :raw needs to be added to encode:

can-attribute-encoder/can-attribute-encoder.js

Lines 105 to 106 in 44a00dc

	// - on:fooBar, fooBar:to, fooBar:from, fooBar:bind
	if (startsWith(encoded, 'on:') || endsWith(encoded, ':to') || endsWith(encoded, ':from') || endsWith(encoded, ':bind')) {

…and decode:

can-attribute-encoder/can-attribute-encoder.js

Line 165 in 44a00dc

if (startsWith(decoded, 'on:') || endsWith(decoded, ':to') || endsWith(decoded, ':from') || endsWith(decoded, ':bind')) {

This came up because of a question @pYr0x asked on Gitter: https://gitter.im/canjs/canjs?at=5af0bb0459a0578004b08c89

[m-mujica]

@pYr0x had to take this one from you, hope you don't mind ;)