Micro library fixes

- fixes fell logging in IE8 (https://github.com/BladeRunnerJS/brjs/issues/920)
- moves all submodules into subtrees (https://github.com/BladeRunnerJS/brjs/issues/726)
- uses latest of topiarist, fell and emitr
  - fixes 'Topiarist does not work in IE8 without es5-shim' (https://github.com/BladeRunnerJS/topiarist/issues/10) - shims should be provided by the user and not the library, so this is no longer an issue. BRJS provides the necessary shims to make this work in IE8
  - update browsers used in tests for fell, topiarist and emitr (https://github.com/BladeRunnerJS/topiarist/issues/13)