solution and projects for Mono

--HG--
rename : Source/Generator/IronMeta.Generator.csproj => Source/Generator/IronMeta.Generator.Mono.csproj
rename : Source/IronMeta.sln => Source/IronMeta.Mono.sln
rename : Source/IronMeta/IronMeta.csproj => Source/IronMeta/IronMeta.Mono.csproj
rename : Source/Matcher/IronMeta.Matcher.csproj => Source/Matcher/IronMeta.Matcher.Mono.csproj
rename : Source/Samples/Calc/Calc.csproj => Source/Samples/Calc/Calc.Mono.csproj