review and complete 3.1

[mfrasca]

some parts of the user interface for 3.1 do not work properly:

• [x] Editing Plant or Accession, Location and intended Location get always initialized to empty
• [x] Species: can not add infraspecific parts
• [x] Accession 2014.0668 in cuchubo does not show infobox
• [x] we want some margin next to the ghini icon in the home screen
• [x] Plant: adding a new note results in hardly visible video in plant 2014.0028
• [x] replace all GtkHBox with GtkBox, and all GtkVBox with GtkBox+orientation vertical;
• [x] add Notes interface for Location
• [x] cherry pick windows corrections (67f5f78a51ccfbf981caab58167e990a1106cf2d)
• [x] reduce Gtk dependency to 3.18
• [x] identify dependencies and write new devinstall script
• [ ] select search from drop-down should execute the search
• [ ] Accession: wild status does not get sensitive
• [ ] Species always asks 'confirm lose changes' even after no change at all.
• [ ] Accession should show taxon identification with qualifier
• [ ] Location, Container, Germination media are not selectable in Propagation Editor
• [ ] grab values of notes categories from notes, in Tag presenter

[mfrasca]

the ones still open do not stand so much in the way, so I published 3.1.3 to the 3.1 line.

[mfrasca]

select search from drop-down should execute the search

I had done something to implement this one, but it totally broke the whole interface. 28624fbc547031b03ff96cdfe8eb4127d496d57c

[mfrasca]

published 3.1.5

[mfrasca]

while installing 3.1 on mint Sonya (18.2), I met this:

Traceback (most recent call last):
  File "/home/loes/.virtualenvs/ghide/lib/python3.5/site-packages/bauble/plugins/garden/institution.py", line 444, in on_select_map_clicked
    map = MapViewer(_('Zoom to garden'), self.view.get_window())
  File "/home/loes/.virtualenvs/ghide/lib/python3.5/site-packages/bauble/plugins/garden/institution.py", line 64, in __init__
    self.clutter_view.set_horizontal_wrap(True)
AttributeError: 'View' object has no attribute 'set_horizontal_wrap'