[Qt-creator] proposals for generic project manager

[Sven Goericke]

Hi,
while implementing at least the "Add New Folder" option in generic
projects (and in turn get an overview how project management works) i
got some ideas for improvements:

1. Instead of maintaing a "<project>.files" list with files belonging to
the project define a set of file-extensions which should be used in the
project. So you no longer need to update the <project>.files outside
Creator but it will pickup all needed files on startup.

2. Preprocess-Makros per build-configuration. This should also be
possible. Defining them per build-config would at least help to distinct
between Debug and Release builds (and get the code-model updated per
config).

3. Get rid of the default "all" and "clean" targets. Even if they are
widely used those targets are not a requirement in any generic
build-system. Also (as the word "generic" suggests even don't assume
that "make" is used as build-command).

I think with that improvements we would keep the generic way of the
generic project manager but would offer some options which are currently
in projects using one of the other build-systems (CMake,qmake,qbs)...

Sven