pgAdmin 4 commit: Re-organise node structure and loading to make things

Re-organise node structure and loading to make things somewhat more
simple. This also adds the ability to display servers on the treeview.

Branch
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master

Details
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http://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=fe834d1ed2147243b7946488f8fc6ce0fd6a754f

Modified Files
--------------
runtime/pgAdmin4.cpp | 4 +-
web/pgAdmin4.py | 5 +-
web/pgadmin/__init__.py | 8 +-
web/pgadmin/browser/__init__.py | 5 +-
web/pgadmin/browser/hooks.py | 38 +-----
web/pgadmin/browser/nodes/CollectionNode.py | 14 --
web/pgadmin/browser/nodes/ObjectNode.py | 15 ---
web/pgadmin/browser/nodes/server_groups/hooks.py | 60 ---------
.../server_groups/static/img/server-group.png | Bin 504 -> 0 bytes
.../templates/server_groups/server_groups.js | 82 ------------
web/pgadmin/browser/nodes/server_groups/views.py | 121 -----------------
web/pgadmin/browser/server_groups/__init__.py | 15 +++
web/pgadmin/browser/server_groups/hooks.py | 68 ++++++++++
.../browser/server_groups/servers/__init__.py | 16 +++
web/pgadmin/browser/server_groups/servers/hooks.py | 61 +++++++++
.../server_groups/servers/static/img/server.png | Bin 0 -> 553 bytes
.../servers/templates/servers/servers.js | 82 ++++++++++++
web/pgadmin/browser/server_groups/servers/views.py | 117 ++++++++++++++++
.../server_groups/static/img/server-group.png | Bin 0 -> 504 bytes
.../templates/server_groups/server_groups.js | 82 ++++++++++++
web/pgadmin/browser/server_groups/views.py | 139 ++++++++++++++++++++
.../browser/templates/browser/js/browser.js | 11 +-
web/pgadmin/browser/utils.py | 53 ++++++++
web/pgadmin/browser/views.py | 18 +--
web/pgadmin/misc/views.py | 27 ++++
web/pgadmin/settings/views.py | 2 +-
web/pgadmin/utils/ajax.py | 28 ++++
web/pgadmin/utils/views.py | 27 ----
web/utils/ajax.py | 28 ----
29 files changed, 723 insertions(+), 403 deletions(-)