updates for 2.0 and for managing ejs properly

1) Updates for 2.0 including adding `coffeescript`, `less` and `copy` modules, all of which have been pulled out of Mimosa core
2) Now ignoring ejs files. Previously they were being treated as EJS client-side micro-templates.  But you are using as server templates.  Other item in `watch.exclude` is the default that we are amplifying with the `ejs` addition.