Change the File class and regular expression function

[zero2hex]

Changes

• Add a function 'searchWithRegularExpression' for using regular expression simply.
• Change the File class formed utility(or helper) into that needs instantiation.
• Add the libuv libraries and headers.

Examples

File reading

let file = Readable(fileAtPath: path).open()
var buffer = [UInt8](count: 8, repeatedValue: 0)
let data = NSMutableData()

while file.status == .Open {
    let result: Int = file.read(&buffer, maxLength: buffer.count)
    data.appendBytes(buffer, length: result)
}

file.close()

File writing

let file = Writable(fileAtPath: "\(path).swift", option: O_CREAT|O_TRUNC).open()
file.write(UnsafePointer<UInt8>(code.dataUsingEncoding(NSUTF8StringEncoding)!.bytes), maxLength: code.characters.count)