* Do not use the BuildManager but have the qmakestep trigger
   the update via the target and project.

Reviewed-by: dt

 * 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

 * Use new BuildSteps interface (as seen in ProjectConfiguration).
 * Use new factory to construct/clone/restore them.

Reviewed-by: dt

They do what you expect them to do, that is build only a subtree.
The implementation is a little bit strange. We temporarly set the sub
node to be built on the BuildConfiguration, enqueue that
BuildConfiguration (which calls BuildStep::init()), and then reset that
temporary value.

A more general way would be to have the ability to extend
BuildConfiguration::buildProject() in a way that additional data can be
passed to the BuildSteps.

Task-Nr: QTCREATOR-5
Task-Nr: QTCREATORBUG-44

Task-Nr: QTCREATOR-269

Instead note that it is invalid if trying to build and on the projects
mode pane.

Task-Nr: QTCREATORBUG-459

  * Use id() for methods returning a string used to represent
    some type of object.
  * Use displayName() for strings that are meant to be user
    visible.
  * Quieten some warnings while touching the files anyway.
  * Move Factories to their products in the plugins where that
    was not done before.

Reviewed-by: dt

 * Rework IBuildParser:
    * Remove name() method.
    * Remove enterDirectory and leaveDirectory signals.
    * Allow chaining of parsers.
 * Rename IBuildParser to IOutputParser.
 * Implement GnuMakeParser.
    * Remove entering/leaving directory related code from all other parsers
    * Move filename fixup heuristic based on entering/leaving directory
      massages from gnumake here from AbstractMakeStep.
 * Add outputParser method to ToolChain: This removes the need to map
   toolchains to BuildParser names in the BuildSteps.
 * Enhance AbstractProcessStep to accept a IOutputParser to parse its output.
 * Remove AbstractMakeStep.
 * Set the appropriate Parsers in all classes deriving from AbstractProcessStep
   and append the ToolChain's parser to the parser chain.
 * Remove BuildParserFactories: There is no more need for them.
 * Remove constants used to identify the BuildParsers.
 * Clean up some names:
    * Replace stdOut with stdOutput.
    * Replace addToTaskWindow with addTask and addToOutputWindow with
      addOutput. Do this wherever it is not yet clear that this will end up
      in the Task/Output window.

Reviewed-by: dt

Should fix a lot of corner cases, might introduce a few bugs.
Also rename functions/slots to be better named.

Generic Project Manager and CMake Project Manager are missing from this
patch.

Move the code that compares the Qt version's debug|release property
with the build configuration's debug|release property
to the new build configuration class.

Reviewed-by: dt

Also rename some methods/signal to make clearer that those only are
relevevant for user changes not for all arguments.

Rename arguments to allArguments(), qmakeArguments() to userArguments()

instead of a Project. Since BuildSteps "should" only care about the
BuildConfiguration not the Project. (Not 100% doable, but still.)

Note: I didn't fix all the connects and there are a few missing things.
This compiles, more work is coming.

The project() should in most cases not matter, instead the
BuildConfiguration should. This shows all the information that needs to
move into the BuildConfiguration classes.

Enables users to change which buildsteps get run per buildconfiguration.
Some further tweaks are probably necessary. This is a rather big
change, though it should work. :)

Add an option to have a buildparser for the qmake step and implement
a pretty simple parser.

Reviewed-By: dt

That is the effective qmake command and summary label.

in case one has set MAKESPEC but does not actually pass it as argument.

Reviewed-by: dt

That is we actually parse the mkspec and evaluate QMAKE_CXX (and a few
other variables) to figure out the correct mkspec. This makes using
custom mkspecs easier and is also cleaner. I also changed mkspec() and
mkspecPath() to behave a little diffrent, essentialy mkspec() will
return only the name (the actual dir name) of the mkspec. That is in
general not sufficient for passing on to qmake. mkspecPath() only
returns the correct path to mkspecs/default.
Hopefully I haven't broken WinCE/Maemo/MinGW.