And add a few helpful error messages

Task-number: QTCREATORBUG-7826

Change-Id: Ia9f9fa476cecf2cff198bc460408bc062e119338
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

* Rename profiles to kits.
* Update some strings:
   * projects mode has a Kits tab, not a Targets tab.
   * " Settings" was dropped from the sub-tabs of the Kits tab
   * menu entry "Build/Open Build/Run Target Selector" was renamed
     to "Build/Open Build and Run Kits Selector".
   * Use "Kit" instead of "Target" in miniprojecttargetselector.
     (The class was not renamed as it does indeed select targets,
      not kits)

Change-Id: I0727e086e2dfa0e8aaaf89fdc6f2e3596c7a4314
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

Fix whitespace, capitalization, naming, comments, add 'using'
in .cpp, remove 'using' in .h, remove unneeded Q_UNUSED, add
needed Q_UNUSED, etc.

Change-Id: Ibf9ba57850cbea1e79e152ec0165c8b01fa66567
Reviewed-by: hjk <qthjk@ovi.com>

Change-Id: I7134d7de30bcf9f9dcfad42520dd45ee083a852d
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>

Update factories for this to work as well as the settingsaccessor.

Change-Id: If7cb1db3fa0c50441aa5bd1c2d2659c6a0177743
Reviewed-by: Daniel Teske <daniel.teske@nokia.com>

Introduce Profiles to store sets of values that describe a system/device.

These profiles are held by a target, getting rid of much of the information
stored in the Build-/Run-/DeployConfigurations, greatly simplifying those.

This is a squash of the wip/profile branch which has been on gerrit for a
while, rebased to current master.

Change-Id: I25956c8dd4d1962b2134bfaa8a8076ae3909460f
Reviewed-by: Daniel Teske <daniel.teske@nokia.com>

Most derived classes used essentially identical 'return 0;'
implementations. Use a base class implementation doing that instead.

Change-Id: I99727ac2230a5d9f168b4b0eb5927f8efff44e64
Reviewed-by: Daniel Teske <daniel.teske@nokia.com>

Use Core::Id for all the project related objects in favor of plain
QStrings.

Change-Id: I790ab40cb29899efdb49c413a77609486f52e683
Reviewed-by: Daniel Teske <daniel.teske@nokia.com>

Change-Id: Iad58914f067a6ef6d3412ccd42f757d821e39e45
Reviewed-by: Alessandro Portale <alessandro.portale@nokia.com>