[gcompris-devel] Release 4.1

[Bruno Coudoin]

- added a new top level menu that holds experiencing activity like
  watercycle, canal lock, ...
- in the drawing activity, added more items, support for rotation, added
  flip image, removed point tool.
- in the draw activity, rotation support is strange sometimes regarding
  the rotation center.
- in the draw activity, now there is 4 times more colors to chose from.
  Color name are no more voiced.
- In the board compilation process, activities are no more dynamic
  linked with anything.
- about: added credit to the Background Music to Rico Da Halvarez.
- changed the compilation process (configure.in) to compile python by
  default now.

Translation updates:
- cs.po: Updated Czech translation by Miloslav Trmac
- fr.po: Updated French translation by Bruno
- it.po: Updated italian translation by Immacolata Arenga
- nl.po: Dutch translation updated by Tino Meinen.
- sk.po: Updated Slovak translation by Zdenko Podobny.
- sl.po: created by damjan kovac <damjan at o-bakovci.ms.edus.si>
- sr.po, sr at Latn.po: Updated Serbian translation by Danilo Å egan
- sv.po: Updated Swedish translation by Christian Rose