Multichannel grabber

[photoniker]

• add demo
• add meta information for plugin dataobject m_data
  (liveImage of DummyGrabber)
• add Gaussian spot to DummyMultiChannelGrabber
• add meta information to DummyMultiChannelGrabber dataobject
• adapt snapshot tool to DummyMultiChannelGrabber
• adapt meta information during liveImage (Current close/re-open liveImage is necessary)
• adapt configDialog, dockWidget of DummyGrabber and DummyMultiChannelGrabber
• camera.setParam("roi[2]", 400) does not work for the multichannelgrabber
• close issue ito::DObjMeta allowedTypes is wrongly implemented: Fix with next AddInInterface increment #187 after increment AddInInterface
• merge Plugins PR
• merge Designer PR
• getParamListInfo() return as last elemente none
  
• Return 3d dataobject with number of planes as Channels?
• addInMultiChannelGrabber.h should be restructured with a private class using the d_ptr structure, such that modifications, that will probably occur at some time, can be done without the need to change the binary compatibility. Appendix: AddInMultiChannelGrabber has a private class, but its nested struct ChannelContainer should be moved as good as possible into any cpp file.
• extend documentation about standards and ideas behind AddInMultiChannelGrabber
• we should check, if defaultChannel should be used both for settings the default, initially displayed channel, for any newly opened plot of a multigrabber plugin AND for the channel, to which the current parameters belong to, or if we should divide this into two parameters defaultChannel and channelSelector.

[magro11]

Further todos:

• addInMultiChannelGrabber.h should be restructured with a private class using the d_ptr structure, such that modifications, that will probably occur at some time, can be done without the need to change the binary compatibility. Appendix: AddInMultiChannelGrabber has a private class, but its nested struct ChannelContainer should be moved as good as possible into any cpp file.
• extend documentation about standards and ideas behind AddInMultiChannelGrabber
• we should check, if defaultChannel should be used both for settings the default, initially displayed channel, for any newly opened plot of a multigrabber plugin AND for the channel, to which the current parameters belong to, or if we should divide this into two parameters defaultChannel and channelSelector.