Enabling other plugins to know which tasks currently exist.

Is more then twice as fast

Task-Nr: QTCREATORBUG-1044

Task-Nr: QTCREATOR-7

Since otherwise we can't forward declare it.

 * Update the import label (and related stuff) whenever the
   project was rebuild.

Actually that's more correct. E.g. imagine building a project, and while
the qmake step runs changing the working directory. The make step would
be affected by that. With the change both the qmake and make step get
their working directory on beeing added to the queue and so don't care
if the setting is changed afterwards.

The pointers can be used to distinguish BuildConfigurations

Move the API to the progress manager.
Added a first Mac implementation, other
platforms are pending.

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. :)

 * Use Task class in addToTaskWindow(...) signal. This introduces
   support for task categories into the BuildParsers.
 * Add a task category for buildsystem issues.
 * Update existing BuildParsers to new API and assign their
   tasks to the Compile or Buildsystem task category.

Reviewed-By: dt

The category differs between e.g. TODO tasks, compiler errors/warnings,
qml syntax errrors ... Idea is that every plugin can manage it's
own virtual list of tasks.

Reviewed-by: dt

Builds, but I'm pretty sure it doesn't *work* :)

.. and purge unneeded includes.

Reviewed-by: Trust Me

Conflicts:

	src/libs/cplusplus/CppBindings.cpp
	src/libs/cplusplus/CppBindings.h
	src/libs/cplusplus/FastPreprocessor.cpp
	src/libs/cplusplus/FastPreprocessor.h
	src/plugins/cpptools/cppcurrentdocumentfilter.cpp
	src/plugins/cpptools/cppcurrentdocumentfilter.h
	src/plugins/cpptools/cppsemanticsearch.cpp
	src/plugins/cpptools/cppsemanticsearch.h
	src/plugins/duieditor/parser/qmljs.g
	src/plugins/duieditor/parser/qmljsast.cpp
	src/plugins/duieditor/parser/qmljsast_p.h
	src/plugins/duieditor/parser/qmljsastfwd_p.h
	src/plugins/duieditor/parser/qmljsastvisitor.cpp
	src/plugins/duieditor/parser/qmljsastvisitor_p.h
	src/plugins/duieditor/parser/qmljsengine_p.cpp
	src/plugins/duieditor/parser/qmljsengine_p.h
	src/plugins/duieditor/parser/qmljsgrammar.cpp
	src/plugins/duieditor/parser/qmljsgrammar_p.h
	src/plugins/duieditor/parser/qmljslexer.cpp
	src/plugins/duieditor/parser/qmljslexer_p.h
	src/plugins/duieditor/parser/qmljsmemorypool_p.h
	src/plugins/duieditor/parser/qmljsnodepool_p.h
	src/plugins/duieditor/parser/qmljsparser.cpp
	src/plugins/duieditor/parser/qmljsparser_p.h
	src/plugins/duieditor/parser/qmljsprettypretty.cpp
	src/plugins/duieditor/parser/qmljsprettypretty_p.h
	src/plugins/duieditor/rewriter/rewriter.cpp
	src/plugins/duieditor/rewriter/rewriter_p.h
	src/plugins/duieditor/rewriter/textwriter.cpp
	src/plugins/duieditor/rewriter/textwriter_p.h
	src/shared/cplusplus/ASTClone.cpp
	tests/manual/cplusplus/main.cpp

Reviewed-by: Trust Me

Parse percent output of cmake, report via QtConcurrent and modify the
BuildManager to also report the progress to the ProgressManager.