Some minor comment changes

No big deal
Optimization in getDb use

We now use the stored reference instead of asking to couchdbkit
Hostbrowser draw optimization

Using setOpen only on Workspace and Categories. This change widely
increases the UI performance on start
Added support to notify events through a notifier

Now we can import the notification_center from guiapi and notify any UI
about certain events. Most of them are triggered by the model controller
and the workspace, but it can be used anywhere.

Every action has the responsabilty of trigger the notification.

We are using the "addHost", "editHost" and "delHost" methods to update
the hosttree, but it can be changed later to be more specific (addInterface,
addService, and so on)
fix requirements
Tickets 398, 399 y 400

Se agregaron campos a la vista hosts. Compound ahora muestra vista expandida de todos los servicios para un host.
Modifica la manera en que trae los datos compound.html

Filtra los servicios por ID de host y trae solo los servicios que corresponden. Esto completa el ticket 399, que a partir de ahora pasa a testing.
Vulns creation test cases
Adding method for severity standarization
Adding testcase for vuln severity normalization

To standarize when using numerical or strings
Estandarize severity vuln when updating public attributex
Merge branch 'performance' into integracion

Closes #404
Closes #405
Closes #414
Closes #415
Closes #416
Closes #417
Closes #418
Merge branch 'vulns_normalization' into integracion

Closes #409
Fix plugin_controller_api test case
Fix list vulns and list notes
Minor fix vuln test case

Workspace deletion and sync thread stoped
Fixing testcases

ADding stopthreads for bypassing the no_db error while removing active
workspace (this is reported in ticket #436).
Merge branch 'integracion' of git.assembla.com:faraday into integracion
workspace test case added
removing duplicated vulns tests