Began work on rewriting parser without object orientation

Parsing is expensive, if the parse tree can be stored on the DB it can 
save a lot of compute time, but mongo can't store Classes, so we 
re-write without classes

app/imports/parser/ResolveContext.js

@@ -0,0 +1,20 @@
+export default class Context {
+  constructor({errors = [], rolls = []}){
+    this.errors = errors;
+    this.rolls = rolls;
+  }
+  error(e){
+    if (!e) return;
+    if (typeof e === 'string'){
+      this.errors.push({
+        type: 'error',
+        message: e,
+      });
+    } else {
+      this.errors.push(e);
+    }
+  }
+  roll(r){
+    this.rolls.push(r);
+  }
+}