* doc/gramps-manual/C/figures/*.png: Add new figures.
* src/MergePeople.py: Minor cleanups; Help buttons.
* src/MergeData.py: Minor cleanups; Help buttons.
* src/mergedata.glade: Minor cleanups; Help buttons.
svn: r4472
* src/gramps.glade: add menu items for merging
* src/MergePeople.py: new person merge
* src/gramps_main.py: merge handling callbacks
* src/mergedata.glade: updated interface for merging
* src/SourceView.py: connect SourceView.merge into the multiple
selection mechanism
svn: r4254