* feat(sidebar): add menu sidebar updating
Relates to issue #236
* refactor(sidebar): move menu initialization into app component
Also fix BaMenuService provider (move it into module providers from component providers)
* refactor(sidebar): move baMenuService to services directory
- NgaModule - module wrapper for all ng2-admin custom features
- Ng Module per page
- async components load
- menu moved (again) to a separate file (as now each module has its own route file)
- no need to import Ba* directives into the pages which have NgaModule in the import statement