extracted healthcheck into its own service
bugfix
Counter for Available and InQurantine Assets in Dashboard view

Squashed commit of the following:

commit e8222456af6185502e0f984356906a165786beb6
Author: k0pernikus <philipp.kretzschmar@gmail.com>
Date:   Tue May 13 12:46:11 2014 +0200

    wip

commit cc022243367d61f70380a0f91e515541a6c2d9fd
Author: Philipp Kretzschmar <philipp.kretzschmar@gmail.com>
Date:   Tue May 13 11:57:05 2014 +0200

    wip

commit 5b296c3f154710c6c2585352f926eff1f60b95d3
Author: Philipp Kretzschmar <philipp.kretzschmar@gmail.com>
Date:   Tue May 13 11:51:36 2014 +0200

    Counter for assets next to navigation buttons