Error encoding

[sin-raben]

In the module "node-dbf" there is the following problem:
the encoding with large files,

buffer = overflow + buffer //return string utf-8

replace

buffer = Buffer.concat([overflow,buffer], buffer.length + overflow.length); //return buffer

fields, records "N" may be not integer ("N 15 3"),
when processing fields of type "F" is equal to 0 it returns NaN.

value = +value; //for field.type 'F','N' (standard no leading zeros)

I would also like to ask to add the ability to specify the decoding function of string

value = (buffer.toString @encoding).trim()

replace

if (this.encodingFunction) {
    value = (this.encodingFunction(buffer)).trim();
} else {
    value = (buffer.toString(this.encoding)).trim();
}

and add type the date

if (field.type === 'D') {
    value = new Date(+value.slice(0,4), +value.slice(4,6), +value.slice(6,8));
}