As a note, when installing api-umbrella on Debian 7, I get the following warning:
Unpacking api-umbrella (from api-umbrella_0.6.0-1_amd64.deb) ...
Setting up api-umbrella (0.6.0-1) ...
update-rc.d: using dependency based boot sequencing
insserv: warning: script 'api-umbrella' missing LSB tags and overrides