Merge pull request #199 from ovatsus/master

Fix Freebase exception not including the details
Merge pull request #201 from ovatsus/master

Fix MQL queries > 1500 chars
Fix compatibility with F# 3.1

Code compiled with VS2013 that used FSharp.Data wasn't working because FSharp.Data still targets F# 3.0. Now we detect that case and also replace the FSharp.Core reference like we do for portable class libraries and silverlight (works even if FSharp.Data.DesignTime.dll is compiled in VS2012)

WIP - XmlProvider still is not working, probably still misses a ToDesignTime somewhere, as in this scenario even in full framework we replace assemblies (silverlight didn't support xml, so the problems are probably there since ever). But at least it now fails at compile time instead of at runtime
Merge pull request #203 from ovatsus/VS2013

Fix compatibility with F# 3.1
Merge pull request #206 from ovatsus/master

Update contributing.md (fixes #182)
Mono support

*revert .fsproj files from VS2013 to VS2012 while xBuild isn't fixed
*update to latest NuGet which solves the trailing space problem and doesn't require the consent envvar to be set
*disable silverlight and portable versions on mono
*add mono compiler path for documentation tests
*fix build.fsx and build.sh
Update WorldBank tests