Cleaned comments in boot.js
Cleaned comments in boot.js

- Cleaned up some of the comments
- Added proper method signatures where appropriate
- Split initDynamicRouting out from initServices, to make that clearer to read

TryGhost/Ghost,ErisDS/Ghost,janvt/Ghost,TryGhost/Ghost,TryGhost/Ghost,e10/Ghost,ErisDS/Ghost,ErisDS/Ghost,janvt/Ghost,e10/Ghost