Added file:// uri scheme guard to isWeb
Added file:// uri scheme guard to isWeb

Fixes incorrect behaviour for absolute paths in Mac/Mono

scrwtp/FSharp.Data,AtwooTM/FSharp.Data,olgierdd/FSharp.Data,fsprojects/ApiaryProvider,scrwtp/FSharp.Data,taylorwood/FSharp.Data,taylorwood/FSharp.Data,olgierdd/FSharp.Data,ImaginaryDevelopment/FSharp.Data,tpetricek/FSharp.Data,AtwooTM/FSharp.Data,johansson/FSharp.Data,johansson/FSharp.Data,NaseUkolyCZ/ApiaryProvider,taylorwood/FSharp.Data,scrwtp/FSharp.Data,olgierdd/FSharp.Data,ImaginaryDevelopment/FSharp.Data,johansson/FSharp.Data,AtwooTM/FSharp.Data,ImaginaryDevelopment/FSharp.Data,tpetricek/FSharp.Data,tpetricek/FSharp.Data