serveradminconsole: fix problems with session and database connection.
use a nearly normal login, just without password authentication, but using file auth token instead.
hopefully fixes https://github.com/openpetra/openpetra/issues/10
fix problem with starting the fat client on Linux.
some mono dlls have been in the bin directory.
fixes https://github.com/openpetra/openpetra/issues/7
nant initPlugins will download the git submodules for some specific plugins
fixes https://github.com/openpetra/openpetra/issues/11
Merge pull request #12 from tpokorra/master

a couple of changes for the development environment, and serveradminconsole improvements