CodeModel(s): Unify name/values of accessed environment variables

Format: QTC_*=(1|0).

Now it's easier to change them in the Run Configuration of Qt Creator.

Change-Id: Ifc45cecb89b33a31942b4c3e2d03851a1d72d0bf
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>
CppEditor: Extract CodeModelInspector::Dumper

Change-Id: I58acfb2d049dd4239a3f41b0a5795bfaab7b4f2f
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>
CppEditor: Dump also merged entities if invoking CppCodeModelInspector

Change-Id: I6a167b47363fb14452bd8ba3dc9d4242d17c25b6
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>
CppTools: Use CppCodeModelInspector::Dumper

...if dumping from updateProjectInfo().

Change-Id: I0db5f29605e5cae30e339f246fe2b67e5949fb2d
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>
CppTools: Encode more information in log file of CppCodeModelInspector

Among others the timestamp and if provided, some extra id.

Change-Id: I017c2af197023347c88f2547e7bda8f22b3d00c4
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>
BuildManager: Prevent start of a new build queue while queuing

ProjectExplorerPlugin::runRunConfiguration assumes that if queue()
returns a number larger than 0 then it is not finished yet.
Ensure this by delaying the finished() and buildQueueFinished()
signals.

Done-with: Daniel Teske <daniel.teske@digia.com>
Change-Id: I73c88772add919ac81170c77b2be1a9c79d27065
Reviewed-by: Daniel Teske <daniel.teske@digia.com>