Fixed a bug that caused the Interval and Timer extensions and periodic scheduling in general to throw an ArgumentOutOfRangeException when period equaled TimeSpan.Zero.  Includes corresponding unit tests.
Added new portable target PLLITE for net40+sl+8

Added a new target platform PLLITE to create a portable library which
can be used to target more platforms than the current portable build.

Author:    danneesset <daniel.svensson@hotmail.se>
Make it compile for WP7 again

TypeForwardedTo is not availible on WP7
Add example to demonstrate portable library usage
Package Microsoft.Bcl packages
Update build to target net40+sl5+win8+wp8

Add wp8 as supported plaform for PLLITE
SelectMany overloads with index parameter in selector functions.
Added GroupBy and GroupByUntil overloads with a capacity parameter.
Added missing using statements.
Added missing using statement to unit test.
Ran HomoIcon tool.
Merged with latest changes in CodePlex.
Added the BehaviorSubject<T>.Value property, which extracts the current value.
Implemented OrderBy, OrderByDescending, ThenBy and ThenByDescending, with unit tests.  This also required me to update to the HomoIcon tool and the Qbservable parity unit test.
Rename Ix/NET/** to Ix.NET/**. Rename Rx/NET/** to Rx.NET/**
Rename Rx/NET directory to Rx.NET
Merge commit "update test projects in Rx\Test"
Merge commit "set up nuget package restore for rx"
Update reference paths in the portable library sample project.