better ES3 Map poly + link to es5-shims

bin/es3.js

@@ -64,9 +64,9 @@ module.exports = code => {
     code = `// [ES3-Set-Polyfill
 function Set(I){this.clear();if(I){this._k=I.slice(0);this.size=I.length}}
 Set.prototype["delete"]=function(k){var _k=this._k,i=_k.indexOf(k),h=-1<i;if(h){_k.splice(i,1);this.size--;}return h};
-Set.prototype.add=function(k,v){var _k=this._k,i=_k.indexOf(k);if(-1<i)_k[i]=k;else{_k.push(k);this.size++}return this};
 Set.prototype.clear=function(){this._k=[];this.size = 0};
 Set.prototype.has=function(k){return -1<this._k.indexOf(k)};
+Set.prototype.add=function(k,v){var _k=this._k,i=_k.indexOf(k);if(-1<i)_k[i]=k;else{_k.push(k);this.size++}return this};
 Set.prototype.entries=function(){for(var _k=this._k,e=[],i=0;i<this.size;i++)e[i]=[_k[i],_k[i]];return e};
 Set.prototype.keys=function(){return this._k.slice(0)};
 Set.prototype.values=function(){return this._k.slice(0)};
@@ -80,6 +80,7 @@ ${code}`;
 function Map(I){this.clear();if(I){for(var i=0;i<I.length;i++){this._k.push(I[i][0]);this._v.push(I[i][1])}this.size=I.length}}
 Map.prototype["delete"]=function(k){var _k=this._k,i=_k.indexOf(k),h=-1<i;if(h){_k.splice(i,1);this._v.splice(i,1);this.size--}return h};
 Map.prototype.clear=function(){this._k=[];this._v=[];this.size=0};
+Map.prototype.has=function(k){return -1<this._k.indexOf(k)};
 Map.prototype.get=function(k){var i=this._k.indexOf(k);return -1<i?this._v[i]:void 0};
 Map.prototype.set=function(k,v){var _k=this._k,i=_k.indexOf(k),h=-1<i;this._v[h?i:(_k.push(k)-1)]=v;if(!h)this.size++;return this};
 Map.prototype.entries=function(){for(var e=[],i=0;i<this.size;i++)e[i]=[this._k[i],this._v[i]];return e};

brainstorming.md

@@ -43,7 +43,9 @@ To be able to target every possible env, these are major restrictions to what's
 
 If the target is *JS*, but *not* the *ES3* version of it, any code that won't follow previous convention will still be valid, cleaned up, and work as expected.
 
-Most restrictions and definitions, in such case, will be mostly vaporware, but if the target is *ES3* you are in charge of providing all polyfills that are needed. See *es5 shims* good old library for that, but thi sproject doesn't grant stuff not meant to work out of the box will work.
+Most restrictions and definitions, in such case, will be mostly vaporware, but if the target is *ES3* you are in charge of providing all polyfills that are needed, except for *Set* and *Map*, which are automatically provided when needed.
+
+See [es5-shim](https://github.com/es-shims/es5-shim) good old library for other polyfills.
 
 ## As main program