Development release 2.0

[dgud]

Oki time for a development release.
We need some help with testing, save often :-)

Mac release comes tomorrow.

Some Notes (more things have changed but I have forgotten them)
-------------

- Rewrote to use wx as backend for graphics
It allows us to use more (native) widgets in the future and
copy-paste in text widgets, native fonts and so on.
Much have been rewritten so much can be broken,
please report bugs in the forum.
[dgud] and [Micheus]

- Removed/Changed some features that was hard to port to wx
Setting/removing keyboard shortcuts have changed, see help.
Preview rendering is always on.
Right Click menu icons have been removed.

- Changed the installer for all OS'es, to behave more like native apps.
-- Linux: includes desktop shortcuts with icons.
-- Windows: allows the wings to moved after install
-- Mac: More native apperance, menu in the top bar

- Added edge/hardness/invert command [Mark Whittemore]

- Removed YafRay plugin and added a new YafaRay plugin [oort]
Ported all render plugins to use the new gui. [Micheus]

- Added a file merge dialog so the user can choose what to import. [micheus]