Passive registration fix - #157

This passive registration registers all UNO services that are present in a component's Java or Python implementation. This fixes issue #156.

To be considered as a UNO component a Java Class must have:

• An ctor with com.sun.star.uno.XComponentContext as unique parameter.
• A static final field m_serviceNames of type String[] (ie: an array of String) and having as values the name of the UNO service. This field can be private, protected or public, it doesn't matter.

For a Python class to be considered a UNO component it must:

• Exist a global variable g_ImplementationHelper declared as follows: g_ImplementationHelper = unohelper.ImplementationHelper().
• Exist a global variable g_ImplementationName declared as follows: g_ImplementationName = 'com.sun.star.MyServiceName'.
• Exist a global variable g_ServiceNames declared as follows: g_ServiceNames = ('com.sun.star.task.JobExecutor', ).
• Although this is not controlled, it will also be necessary for it to have the following code:

g_ImplementationHelper.addImplementation(YourPythonClass,         # UNO object class
     g_ImplementationName,                                        # Implementation name
     g_ServiceNames)                                              # List of implemented services