Add paging support

Untested
Add notes on usage

Now tested ... open for feedback
Fixed invalid JSON parsing for empty attributes

An empty string (or null object) is invalid JSON, and needs to be
converted to a 'null' string. jQuery 1.9.0 has exposed this previously
accepted JSON. Now we need to convert it.

http://forum.jquery.com/topic/parsejson-in-1-9-0-is-different-from-earlier-versions
Currently, if using jQuery 1.9.0, this code will throw an exception when
dealing with empty validation attributes.
Merge pull request #59 from joshball/master

Fixing invalid JSON when parsing empty attributes
Merge branch 'master' into html_helpers_paging
adding support for areas in navigation routes
Solved Issue for Win8/IE10/jQuery 1.9.0

Addressed an issue where the .map file on IE10, running on Win 8, was
causing an issue in the minification/client script delivery pipe,
resulting in critical JavaScript errors being thrown from the browser.
Merge pull request #60 from MisterJames/master

Solved Issue for Win8/IE10/jQuery 1.9.0/VS2012
Merge pull request #51 from serra/html_helpers_paging

Html helpers paging
formating
Support for Vertical/Horizontal Breaks in Navbar

Added property to NamedRoute to allow composition of break in menu.
Added overloads to accept the flag in the configuration extensions.
Updated navigation extenstions to evaluate and build appropriate tags.
Updated samples.
KeyAttribute Location Fix and Convention Failover

Addressed an issue where the code was looking for a propertytype
attribute instead of looking for the attribute on the property itself.
Models correctly annotated with the [Key] attribute were not being
picked up.  Also, while it is considered best practice to attribute the
key with the attribute, it's also not common practice. Added a failover
to pickup properties that match the pattern [Type]Id.
added area datatoken
Update README.md
Merge remote-tracking branch 'ehexter/master'

Conflicts:
	src/NavigationRoutes/NavigationRoutes/NavigationRouteConfigurationExtensions.cs

Merging in conflicts
Corrected sample

Needed to call overload with extra param
Merge pull request #62 from MisterJames/master

Support for Vertical/Horizontal Breaks in Navbar
Merge remote-tracking branch 'erichexter/master' into breadcrumbs

Conflicts:
	src/NavigationRoutes/NavigationRoutes/NavigationExtensions.cs
	src/NavigationRoutes/NavigationRoutes/NavigationRouteConfigurationExtensions.cs