added getUrls to webspacemanager
added method to retrieve environment from portal
added getPortalInformations to WebspaceManager
added getHost to PortalInformation
added getPrefix to PortalInformation
Merge branch 'develop' of git://github.com/sulu-cmf/sulu into feature/webspace-manager-additions
Added CONTRIBUTING
Merge pull request #177 from sulu-cmf/feature/contributing

Added CONTRIBUTING
indexed webspace environments by type
Merge pull request #164 from sulu-cmf/feature/webspace-manager-additions

[ENHANCEMENT] added methods to retrieve portals and urls from WebspaceManager
Merge branch 'develop' of git://github.com/sulu-cmf/sulu into feature/navigation-context