Change ConsoleTables.Core framework target to 4.0
Change ConsoleTables runtime target to 4.0
Pass in explicit null as second argument for PropertyInfo.GetValue method

This was required to clear a compile error: "Cannot resolve method 'GetValue(T)', candidates are..."
Reference http://msdn.microsoft.com/en-us/library/b05d59ty(v=vs.100).aspx
Merge branch 'feature-targetDotNet40' into develop
Merge branch 'release-dotNet40Target'
Merge pull request #3 from Lumirris/master

Targets dotNet 4.0