0.2.11

Added file system.

path := "/tmp/kanlang.test" as FilePath;
msg := *FileContent as LogMsg; *LogResult;

Added string split

a := "hello world";
b := " " as SplitOperator;
for w in *[SubString] {
    msg := w as LogMsg; *LogResult;
}

Added string length

a := "hello world";
b := *StringLength;

Allow empty array

a := [] as [num];

can alias arrays

type Numbers alias [num]

bug fixes on the type request.
_ gives better errors when no path can be found
_ allow request in first statement after for loop * no longer uses variables in catch as variable in request

fixed token classes to allow prefif in variable name. i.e. input is not a valid identifier (starts with the keyword in)