Added separator to model in renderPartial function
Change to ModuleManager to accept null modules

Changed ModuleManager so I can use statements in application.config.php file like:

return array(
	'Application',
	$env=='dev' ? 'ZendDeveloperTools' : null
)

Null modules are silently ignored.
Added unit tests

Changed source to conform to Zend coding standards
Merge pull request #5080 from serpent7776/master

Added separator to model in renderPartial function
[#5080] Revert ModuleManager changes

- outside stated scope of issue/pull request.
[#5080] CS fixes

- EOF marker
Merge branch 'feature/5080' into develop

Close #5080