:issue snuck back in during rebasing.

Must have snuck in during one of the multiple rebases while observers were
being refactored.

It helps to actually deliver messages.

Used the built-in observer enable/disable feature in ActiveModel[1].
ActiveRecord::Base includes ActiveModel::Observing which provides this
behavior.

Simple wraps to enable the observer under test were added to the specs
for: ActivityObserver, IssueObserver, Admin::Users and Issues.

The spec for Project.last_activity was refactored to separate the tests
for #last_activity and #last_activity_date. Each had doubles added to
isolate the spec from the hidden dependency on the ActivityObserver
action to create an Event for the project when an Issue is created. This
ActivityObserver behavior is already tested by its spec.

[1] http://api.rubyonrails.org/classes/ActiveModel/ObserverArray.html

Update IssueObserver to create a Note on the issue its being closed.

Handles emails for new issues and reassigned issues.
Need to add creating a Note on Issue close.

This reverts commit ef1598b4.

This reverts commit 5b1ede62.

This reverts commit 7484bcff.

Replace calls to deprecated link_to_function with doc-ready functions.

make a hyperlink from the counted keys

Refs Ticket #948

Replaces link_to_function use which was deprecated in Rails v3.2.4.
https://github.com/rails/rails/commit/9dc57fe9c

Still absent is a graceful degrade for no-JS.

Update to the latest grit

The latest grit includes a patch for performance improvements.

Network graph fix (#909)

network graph: change lines to be more github-like (removes some ambiguousness in graph presentation)

Update Fonts to include good Windows Default monospaced font, too.

Modified the login screen for primarily LDAP authentication

Replaces link_to_function use which was deprecated in Rails v3.2.4.
https://github.com/rails/rails/commit/9dc57fe9c

Still absent is a graceful degrade for no-JS.