Merge branch 'master' into 3.0

# Conflicts:
#	dev-requirements.txt
#	gns3server/controller/__init__.py
#	gns3server/controller/appliance_manager.py
#	gns3server/controller/compute.py
#	gns3server/controller/topology.py
#	gns3server/handlers/api/compute/ethernet_switch_handler.py
#	gns3server/handlers/api/controller/link_handler.py
#	gns3server/handlers/api/controller/symbol_handler.py
#	gns3server/version.py
#	requirements.txt
#	tests/controller/test_export_project.py
#	tests/handlers/api/compute/test_qemu.py
#	tests/web/test_response.py
#	win-requirements.txt

gns3server/utils/picture.py

@@ -92,7 +92,7 @@ def get_size(data, default_width=0, default_height=0):
     # End of https://github.com/shibukawa/imagesize_py
 
     # handle SVG
-    elif size >= 10 and data.startswith(b'<?xml'):
+    elif size >= 10 and (data.startswith(b'<?xml') or data.startswith(b'<svg')):
         filetype = "svg"
         fhandle = io.BytesIO(data)
         tree = ElementTree()