feat(bundler): auto tracing for requirejs/systemjs

remove all lib/importer files.
remove most of amodro-tracing.
manual efficient js and html tracing for aurelia.
remove irrelevant tracing cache.
cover all aurelia-webpack-plugin covers, plus more edge cases.
more permissive, usage of PLATFORM.moduleName is NOT required.
almost zero manual maintenance of aurelia.json dependencies.
fix node id compatibility issue #831 for both requirejs and systemjs.
fix bundles moduleIds format for modules need plugin.
fix compatibility issue with yarn workspaces.
support npm package "main":"./lib" when main file is lib/index.js.
improve backwards compatibility by ignoring main:false.
simplify and reduce source code, but increase test coverge.
add "au run --watch --auto-install" for frictionless dev flow.
best guess on package manager 'yarn' to avoid 'npm i' error on yarn
controlled node_modules.
overtake webpack on simplicity, usability, compatibility and flexibility,
but probably not on performance.
perform slightly faster than existing amodro-trace + cache.

Supersede #853, #842, #831
BREAKING CHANGE: require minor user code change to support non-js main, like "main": "font-awesome.css"
BREAKING CHANGE: remove support of undocumented "main": false, replace with generic "lazyMain": true. But this is handled transparently without breaking user's existing app.

.eslintrc.json

@@ -5,6 +5,7 @@
     "strict": ["error", "global"],
     "no-console": 0,
     "no-inner-declarations": 0,
+    "no-undef": 2,
     "comma-dangle": ["error", {
       "arrays": "never",
       "objects": "never",
@@ -20,6 +21,8 @@
     }
   },
   "env": {
-    "node": true
+    "node": true,
+    "es6": true,
+    "jasmine": true
   }
 }