[csw-announce] Update to libsigc++

[Dagobert Michelsen]

Dear users,

we are currently working on rtorrent which requires an updated libsigc+ 
+.
There have been three packages in the past:

   libsigc++          CSWsigc++          contained 1.2.5
   libsigc++_rt       CSWlibsigc++rt     contained 2.2.3
   libsigc++_devel    CSWlibsigc++devel  contained 2.2.3

To clean this up there have been the following changes:

- Remove libsigc++rt as libraries usually don't have runtime-packages
- Update libsigc++ to 2.2.7 and change the package name to CSWlibsigc++.
- Make the new package CSWlibsigc++ incompatible to the existing  
CSWsigc++
- Update libsigc++_devel to 2.2.7

Additionally, there have been a number of libraries which depended on
the previous packages, but which were not used from other packages  
within
the CSW distribution. These packages have been removed from the catalog
and may be re-added if they will be needed again:

- CSWgtkmm2
- CSWgtkmmrt
- CSWglibmmrt
- CSWglibmmdevel


Best regards

   -- Dago