Allow gazebo deployers without component section

This pull requests adds support for deployer instances without a `<component>` section in its SDF config. The whole deployment can be done from Orocos scripts in the `<orocosScript>` section. I am using my standard components without the special gazebo operations and use ROS streams to communicate with other Gazebo plugins.

The first patch removes the `gnulinux: command not found` error message in the console script. Furthermore I assume the intended syntax for inline Orocos scripts is 
```
<orocosScript>
  <inline>
    ...
  </inline>
</orocosScript>
```
instead of
```
<orocosScript>
  <inline/>
  ...
</orocosScript>
```
and updated the `loadScripts()` method accordingly.