also removed all code inside USE_P4_API. Gits history be our backup,
if we ever want to use the P4 Api directly in the future.

Rename qtworkbench to qtcreator

Rename QWORKBENCH_UTILS_LIBRARY to QTCREATOR_UTILS_LIBRARY

Done with: mae

On this occasion, fixed qtcreatorwidgets plugin for lib64.

Initial-patch-by: Christian Hönig

also available for remote debugging.

use the data copying custom compiler approach here, too.
this leaves more work to qmake, which is good.
on the upside, pluginspecs will be installed when they change without
having force a re-link of the plugin itself.
on the downside, installation of a pluginspec will force a re-link of
the plugin. oh, well - you can't have it all (with qmake) ...