Added email host/port availability indicator.

Intent: Dimmed when no host/port is entered. Red when specified
host/port is not available. Green when specified host is responding on
the specified port.
Added spinning indicators, constraints.
Adjusted resize behavior of Configure tab.

Vertical space is now equally split between Repositories and Recipes
lists.
interface work + sendEmailNotification
Test E-mail Status implemented

Fixes #52
First pass at SMTP server availability indicator

First try at #16; does not appear to be functional and will need
further debugging.

Also added code to remove a notification listener for the Test E-mail
progress indicators for check apps now, and update repos, using NSNotificationCenter
merge master mailcore2 fix
Merge branch 'master' into progress-indicators
add progress panel for check apps and repo update
get update repo to show progress window.  update stop progress window to include error handling.
get stderr of autopkg run sent to progressPanel.
Merge branch 'master' into progress-indicators
Merge commit 'cb9246b62ec63285c8a37c0090e0fc63147902c8' into progress-indicators

* commit 'cb9246b62ec63285c8a37c0090e0fc63147902c8':
  Added Apache License boilerplate to all source files.
  Added Apache License 2.0.
  Added Eldon Ahrold to Credits.rtf.
  Improved detection of AutoPkg RecipeOverrides dir, Cache dir, RecipeRepos dir, and local Munki repo.
  Added button for opening the AutoPkg RecipeOverrides dir. This can be an array too so I need to handle that.

Conflicts:
	AutoPkgr/LGConfigurationWindowController.h
	AutoPkgr/LGConfigurationWindowController.xib
Moved error and string objects to Notifications userInfo:
remove spinners where progress panel is now used
don't continue without NSData / And other general tweaks
port test indicator now working
Fixed title case in email subject and changed language in progress sheets.
Removed status light and sheet for Send Test Email, (using spinner instead).