every path should be separator-fixed

Reviewed-by: dt

And refuse to add it twice. The check is pretty simplistic in that it
doesn't take scopes or which variable it's exactly in into account.
But in those cases you need to edit the .pro file manually anyway.

Task-Nr: QTCREATORBUG-932
Task-Nr: QTCREATORBUG-891
Task-Nr: QTCREATORBUG-653

That is e.g. SOURCES instead of whatever variable is used first in the
project file.

Reviewed-By: ossi

Task-Nr: QTCREATORBUG-765

Symbian mkspec puts the package file into the build directory,
not the destination directory.

Task-Nr: QTCREATORBUG-1108
Task-Nr: TOOLS-339

The UI_DIR and MOC_DIR weren't added to the includepath for new
projects, since at the time of parsing the directories don't exist yet.

We now always add UI_DIR and MOC_DIR to the include path, without caring
whether they exist.

Task-Nr:  QTCREATORBUG-1064
Reviewed-By: ossi

This also fixes pkg-config support for the code model.

Task-Nr: QTCREATORBUG-976

On windows when linking to a library via -L/some/path, the library is
found in /some/path while linking. But running that app fails, since it
can't find the library. We now adjust PATH to include all paths from
LIBS and thus the library is found.

Reviewed-by: dt

The solution ain't great. Essentially we need to fix that path() needs
to be unique and a 1:1 mapping to the file system by introducing a
separate method for the first usage.

Task-Nr: QTCREATORBUG-828
Reviewed-By: con

This is a big change touching almost all of our .pro file parsing.
With this patch we only evaluate once exact for all needs and once
greedy for the filelist. That is the qt runconfigurations don't have own
evaluaters but reuse the project wide exact evaluation.

We reevaluate if the user changes the build directory, the qmake
buildconfiguration or the qmake arguments. That is if you open src.pro
(or projects.pro) of qt with a shadow build you still don't get all the
files, but after correcting the build directory, we reevaluate the .pro
files and find all files. So for a suitable definition of fixed, that
bug is now fixed.

We now get the exact defines of all .pro files instead of all defines for all
buildconfigurations. We still don't distinguish in which
.pro file a DEFINE is set. So the code model now knows about all the
defines set for the given configuration but not for which files it is
actually set. Also that includes all DEFINES set in .qmake.cache or the
mkspecs. This means all defines from .pro files should now work.

The intial loading is still synchronous. I haven't looked into it to
deeply, but it seems possible to make it also async.There are probably a
few issues which need to be solved fist.

Also due to the asynchronous nature of the code, the executable is
updated a few seconds after actually changing the build configuration

Pass around contents as string, saving repeated
invocation of FormWindowEditor::contents().
Remove dependency to FormWindowEditor.
Reviewed-by: dt <qtc-committer@nokia.com>

Reviewed-by: Oswald Buddenhagen

Correctly show
* Headers
   * C:\foo
instead of
* Headers
   * C:/foo

Doing it creates huge delays, because it resolves to a network path.
Also rename FolderNode::setFolderName to FolderNode::setDisplayName,
because that's the name of the property.

Task-number: QTCREATORBUG-695

And port the Qt4ProjectManager to use that API for synchronization
between editors and the .pro file tree.

Reviewed-By: con

suppressing the "~QX11PixmapData(): QPixmap objects must be destroyed
..." warning.

 * Ease cross device development by introducing 'targets' which
   group build- and runsettings that are valid for this one target

 Most of the kudos for the code review go to dt. Con, thorbjorn,
 ckandler and others did also review parts of this patch.

Reviewed-by: dt

QString: Use QChar/char where appropriate, do not use QString::null

This is in preparation of the addition of "targets" in the sense
of "platforms to develop for" into the codebase.

Reviewed-by: dt

QString: Use QChar where appropriate.

qmake doesn't, either

that way the file formatting is better preserved.

just parsing it (once ...) ought to be sufficient. we don't need to
validate the syntax beyond that anyway.

Use the filemanager instead

they were remnants of the pro editor, which was removed long time ago.
they were still used for automatic editing of pro files, but were
totally overengineered for that purpose (removed 1300 LOC, added 40).

QMake passes those headers directly to gcc, so the user doesn't need to
include themselves.