Test cases for #521 and #542
Fixed sending of HTTP requests when using a portable class library version of FSharp.Data in the full .NET version (closes #542)
Added more test apps for manual testing + fix decompression when pcl version of FSharp.Data is used in full .Net + fix decompression in windows phone for type providers
Windows 8 fixes
Merge pull request #550 from ovatsus/master

Http fixes + TestApps to simplify testing