OSX: Move libraries from PlugIns/ to Frameworks/
other: move QmlDesigner plugins to plugins directory

Change-Id: Ia266a3514ce6a496061daa044b3781daae0bc272
Reviewed-by: Christian Stenger <christian.stenger@digia.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

Change-Id: Ibb586513f256deb5e0e8aa7c5100055482a031a9
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

Also adapt the Qt Creator plugin template to make it
possible to choose between deploying locally or into
Qt Creator's build directory.

Change-Id: Ia8566a5034443bc9574a1593eddf0a89eb4d80b2
Rubber-stamped-by: Daniel Molkentin
Reviewed-on: http://codereview.qt-project.org/4178


Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

Because executable_path and loader_path are just too inflexible for some
stuff. The rpath is supposed to be set to the Qt Creator app's Contents
folder.
Compiling on 10.4 now requires to enter compatibility mode via
QTC_TIGER_COMPAT env variable or TIGER_COMPAT_MODE qmake variable.

doing it in 1.3 as well to avoid possible later conflicts

Details:  Creator on Linux works now in two modes:
          1) out of the build dir (shadow builds to be tested)
          2) make INSTALL_ROOT=/prefix install